I have absolutely no clue what I'm meant to do with this piece of information. I mean she might be spot on but I don't know how to even go about processing this.

OK so this probably needs a bit of context. About 6 months ago I broke up with my long term girlfriend. This was absolutely devastating, the breakup was messy and in the immediate aftermath I ended up spiralling into a kinda severe mental health crisis. I was basically unable to function for almost a month, at one point my friends were looking at getting me into emergency inpatient care.

That didn't happen in the end but my lifelong best friend took some time off work to look after me. He was a literal angel watching over me making sure I didn't do anything stupid, sitting with me when I wanted to talk, holding me while I ugly cried like a baby. I honestly wouldn't have pulled through without him.

Thing is over the months I've been recovering since out of nowhere I've developed really strong romantic and sexual feelings for him. This is a bit out there for me. Up to this point I was just straight by default, no same sex attractions or fantasies or anything at all, never even looked at a guy in that way. Until now. I've been having real trouble with this tbh. I don't want to fancy my straight bestie, it's like a desire that I'll never be able to fulfil and just a potential source of awkwardness in my closest friendship. Kinda painful tbh. Like if it was literally anyone else I'd probably be fine with it but this is the worst possible outcome.

I'm still in regular therapy to help me work through the remaining aftermath of my mental health issue and in my session today I brought this up with her. She mentioned a few possibilities, like it being a temporary effect of the trauma healing process and the closeness I feel to him, but also mentioned that it's not really that common for people to spontaneously change sexual orientation in adulthood. In her opinion I've most likely been bisexual all along but I've buried it for some reason.

I dunno she might be right, she's a professional so I assume she knows a bit more than me. But how the hell do I go about trying to work out if it's true or not? I don't even have a starting point. Feeling a bit lost and confused about what's going on in my stupid brain.