Title is a little confusing. This is LOOONG but I feel like shit and I need to put it into words so be warned.

I have 2 housemates, let’s call them Brad and Lenny. I’ve been best friends with Brad for about 6 years and lived with him for 3. I moved across the US with him (he was my roommate before that and we moved to CA together).
My friend Lenny is someone I met through work in September of last year. He’s very similar to me and we hit it off almost immediately. He needed somewhere to go after his lease ended so I let him move in during Spring.

Ok, so rewind a bit to before Lenny moving in- to when we were all just friends and Brad was my only housemate.
Lenny has a best friend named Jen. She works with us. They’ve both lived in this city and been buds since they were really little. Lenny, Jen and I got along great when I first started working there. We hung out all Fall, Winter, and Spring. I got pretty close to them and their other friends. I invited Brad to hang out with us too because he didn’t have a lot of friends here. They liked him.
Well, over time it started to become clear to me that Jen was jealous of Lenny and I’s friendship. I think she felt like I was replacing her. We’re both bisexual women and she is in a relationship while I was not (Lenny is a gay man). That means Lenny and I hung out a little more because she spent a lot of time with her bf. She started getting mad about really dumb, petty things. An example: She was upset with me one time because we made plans and then invited her. Why? Because she felt like we didn’t want her there because she wasn’t involved in the plan making...even though I started a group chat that she ignored and the plans were something dumb like going out to eat. She ignored me at work until I apologized to her a week later. She was ONLY ignoring/mad at me.
Things like that kept happening. She got mad so much that Lenny would make me block her from viewing our stories and we couldn’t talk about the times we hung out without her. She would get mad at us even if she was with her bf and couldn’t come. She’d always ignore at me at work until I apologized.

Brad would only hang out with us once in a while. He’s a student and kind of does his own thing most of the time.
It started getting even worse in February. We were out at a club and she was dancing with me. She took me to the bathroom and undressed in front of me/tried to kiss me. She was pretty drunk but not unaware of her actions. I immediately shut it down because she has a bf that I know is not ok with that. I used to be attracted to her, but by that time she was really only my friend bc she was Lenny’s best friend. She had made me lose interest in being close to her through her petty attitude.
There were a few times in the same month that she did other things that I felt were disrespectful to her partner, like telling people at work that she was sexually unsatisfied bc of her bf’s low libido ...she told this to a guy I was dating that barely knew her. She always told us that she was going to dump him, complained about his income, etc.

SO I told her bf. I felt guilty and dirty. I felt like I would want to know if my partner was acting like that. I knew it would basically nuke our relationship but I was pretty over it by that point. She was a bad person. Predictably, she absolutely freaked the fuck out and hates me now. Her bf stayed with her.

So after this she had an episode at work where she started yelling at me in a hallway while people were walking by. Basically having a meltdown and telling me that I’m disgusting, jealous, etc etc. I just walked away. She did this in public in front of other people who work there. Lenny was living with me by that time and I told him she was not allowed to come over anymore because I felt like she had gone off the deep end and I couldn’t trust her.

So now she’s manipulated a lot of people that I work with into thinking I’m some sort of psychopath that was trying to tear her away from her bf even though I’m happily dating someone else and really just don’t want anything to do with her. When we work together she just floats around talking/laughing extra loudly with the people that I usually talk to at work but she ignores me. She’s effectively cutting me off from them by “winning” (in her eyes) social interactions.

She’s also done this with my friends. I no longer get invited to vacations and group activities. Brad does. Brad has basically taken my place. They’re going on a trip that Jen isn’t even going on this weekend and Brad was invited while I was specifically NOT invited. Why? Because one of Jen’s friends (that I also know and used to be friends with) is going. I don’t even want to go but it’s hard to not be hurt.
I feel like I fucked up by letting Lenny move in, as he is very close with Jen and has been manipulated by her for most of his life. I allowed him and that situation to get deeply intertwined with me, my friends, and my personal/work life. She doesn’t treat other people the way she treated me so nobody sees it. I’m just alone now and my friend is their new friend. I’m not upset with Brad but it does hurt and makes me resent all of them for letting her do this to me.

Basically all I have is my s/o. I just want to leave and start over at this point. I hate this place and my current situation. I’ve definitely learned some valuable lessons.

TLDR; My friend/housemate’s bff got jealous, made moves on me, and then freaked out when I was a whistle blower. She manipulated basically everyone into tossing me out and replacing me with MY bff. Yay.