xeno :)'s Things

tw: mentions of suicid3//
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So my friend that I have known for 5 years has been saying sum things to me that I don't know if it's ok. He knows that I have tried to unalive myself once and failed and that I have a depression, this whole year he has been saying stuff like "you're fine, if you really wanted to commit unalive you would've done it long ago. "
or "if you commit unalive remember to record it and give it to me!!" // "if you're really that depressed then go commit unalive, we don't care, even if you're gone nothing will change." I told him back that I tried to but failed and he said back "well you should try and this time not fail. " he would make remarks about my body, my voice and constantly tell me how much I suck at doing normal things, I don't know what to do help lol

Sooo I have a problem..
I have the biggest crush on my boy best friend and I can tell he likes me too but that's not the problem, he has this cousin that is so obsessed over him, not just like over protective she is OBSESSED, her whole entire social media page is filled with him, her profile pic is of him, her header is of him and even her bio is of him, she would post a lot and most of the things she posted was of how much she missed him and loved him so dearly, my friends told me that she was just missing him and that it was normal so I didn't think too much of it. Until me and boy got together this was when shit happens.
After we got together we decided not to tell her and we got matching pfp and soon after that she texted my other friend asking if we were together and he said yes, she freaked the fuck out. Over the past few weeks all her page was: "omg you need to treat him well" or another one which rubbed me the wrong way "I guess he's not mine anymore I'll give him to you" and over the pass month she kept posting how she misses him or how he is not hers anymore.
Lmfao idk what to do help, should I confront her or just stay quiet?