what the hell am i supposed to do??

i literally dont even know what to do, i recently just talked to my ex platonic partner (we are still friends, we just dont talk as much and i guess not close friends anymore) and we were talking and it was all good until the later part they just said weird things and kept mentioning "april" and of course i was paranoid and worried about it so i tried asking what "april" could mean and they didnt even want to tell me, but said that they told them to their other best friend, like okay, i guess im not trust worthy after all we done??? and then right after i of course, was worried hoped they wouldnt harm themself because they were suicidal (i dont know if its getting worse or better they never tell me shit anyways) from family issues and such, and they just kept trying to like "keep it a secret" like its genuinely putting me on the fucking edge here. i tried joking around since they told their other friend and not me and such and they said they knew eachother for a while, and we (me and them) met since like july, but they literally told me they forgot when or how we even met when i so remember them, they said they forget memories and such and it just makes me so bad because i feel so guilty of "maybe im not worth enough" or whatever. look, dont get me wrong i know you have problems and i would comfort you and try to be the best person i can be but you just keep turning me down and just telling me stuff without even telling me what you even mean but telling others, i mean, i still remember when you were on a low part of your life and i was trying my best to comfort you, and you just say right to me that you dont even listen to a thing to what i say, everytime i talk to you seriously its just like im talking to a fucking brick wall. darn it, and i feel guilty for not being able to help save them, its like its my job to help them, which i should be probably.