best friend wont give me space

so me (21ftm) and my best friend (27m) have been arguing a lot over the last few days, and ive been all but physically begging him to give me space and let me have time to process all of this and figure out where i need to go from here. he crossed a huge boundary that him and i had established since the beginning of our friendship, which was going through my phone and reading my messages with another male friend. (we've also dated, and one of his excuses for breaking this boundary was because he had caught feelings for me again recently and had seen that this person has messaged me and he didnt know what came over him). im putting this here even though neither of us are diagnosed with bpd, but we both suspect that one or both of us might suffer from bpd, and i honestly dont know where else to go to seek out advice. if this isnt allowed, please just delete the post. i asked him to go no contact today, without deleting each other off of social media, and hes already breached that twice now too. once because i went over to another friends house to play videogames to help take my mind off of all of this for a little bit, and once in the middle of the night (hence why im writing this at 5am)