I've known this guy with BPD for some time now and I'm fairly certain I'm his FP (we speak every day, he comes to me for every decision that he makes, and he tells me I'm his only true friend). Recently, with covid isolation and all, he's been having a tough time with his family and romantic relationships and has spoken to me about suicide. I did everything I can to help and he is seeing a therapist now.

This relationship wouldn't bother me at all if I wasn't falling for him. I think the FP relationship is putting me in this weird position where I feel like we care for each other so much, but there isn't any actual love there. It's all platonic. He's also extremely hot so that doesn't really help. He's always talking to me about people he's sleeping with (his BPD impulsive decisions are sleeping around with strangers) and it gets me really jealous because I don't think he sees me that way. The relationship is starting to really hurt me because I feel like I'm wanting something that can never happen. My way of dealing with these things is to back out. However, I've familiarized myself with BPD enough to know that I definitely shouldn't abandon him. Especially since I'm his FP and that he's feeling suicidal and lonely. I really don't know what to do. Sometimes I want to tell him that I really like him more than just friends, but I don't know how he would take it. I also don't think a relationship between us could potentially work in our current states.

I really need some advice from people on this sub who can put themselves in his shoes.  What is the best way to go about this? It's starting to take a significant toll on my mental health by bottling all of it up.