(there may be a possible trigger warning on this, but i'm not sure)
(also, she isn't diagnosed but i'm pretty sure that's what this is)
i've known my girlfriend for X years (i'm 1X and she's 1X), and we've only just made things "official" in the sense that we now refer to each other as girlfriends when we talk about one another.
in the time i've known her, i've also known her "friend", L. he's always been kind of an asshole, trying to push me away and saying mean things about me in hopes i'll leave her alone. he even once threatened to burn a notebook i'd sent her as a birthday present when we'd first started talking (which sounds stupid but it was very important to her). he began doing things like asking me for nude pictures of myself because he knows how i feel about my body (i've been dealing with an eating disorder since i was 1X) around the end of 20** and if i said no he would tell me all about how he'd make my girlfriend, M, cut herself or burn herself or whatever he knew would make me send the picture. he would never show her the pictures though (as they were sent to her phone), because even though he wanted me to feel bad, that's the last thing he wants for her and he's made that clear over the last X years.
around the time i started sending those pictures, she developed another alter named J. he's nice and he apologizes a lot for mean things L does. he was developed because she started dating a girl who was really needy and didn't understand what it meant to "not be yourself" and if she had to deal with that she'd have snapped. neither L, J, or M really liked this girl at all towards the end.
around the end of that relationship, M and i were finally going to meet in person over the summer (we met online, lol...)(that was when i met L in person, also) and she told me there was another one. T. when i first talked to him, i said he was like L but more immature (L agreed). over time though... he became a lot worse than L.
*edited by mod on request*
i just would like advice on how to talk more about her getting a diagnosis and starting therapy for this?
if you read all of this, then thank you so much.