So me (25m) and my ex (21f)  have been broken up for a year. From what I read, she has some BPD tendencies, as do I, although I have no idea if it is from my ADHD and OCD, combined with regaining my mental health from past drug abuse.  


Story goes:  
We start dating. She cheats, claims polyamory. We have big, good talk. I try to be good boyfriend. I am a diesel mechanic and thus very busy and career focused, so she would get upset if I wasnt able to talk to her, or played video games after. I didnt get prepared for a wedding I frankly, didnt have the ability to really go to. We end up missing the wedding ceremony despite it ending an hour after I work. She goes on cruise, cheats with another random guy. Cue horrible break up. Me lashing out because I keep asking her to show she cares and just continuously blames me for her cheating. Do my best to accept my part. Constant blocking and ghosting from her. I try to do my best, after researching, to show her that I do love her despite everything. She randomly unblocks me at times, or asks to hang, or asks my roommate about me constantly.

&amp;#x200B;

Recently, she is seeing someone new. I didn't know this, but she asks me to catch up. I suggest it, but it gets ignored. See her with new mans, and shes talking hella shit. Any other talk is ignored. 

&amp;#x200B;

Anyone with a little more experience wanna help me? I do wanna have some sort of relation with her (not necessarily romantic) but it gets increasingly frustrating when she blows me off, or is just inconsiderate to me. Last time we talked for real, she blocked me again (just to unblock me to ask to catch up a few months later) because she apologized and I kinda threw it back because I don't feel like "sorry for hurting you" after cheating twice is really respectable to just say "yeah sorry". Says she knows shes being inconsiderate but can't handle anything. I am guessing rapid splitting on me and herself but I do not know, and wish to move forward. Any help would be appreciated.