Hi there is this girl I like but when I see her acting nice and caring to other people it kills me inside and drives me insane and at times extremely suicidal and makes me think that she doesn't care, I have lashed out her over because and after filled with regret because it's not her fault for the way I feel, I'm starting to feel I may have some sort of BPD when it comes to jealously, this is obviously not the full story but there have been countless times where I have felt like this and dozens of scenarios in my head and I'm wondering is it possible I have BPD or am I just an extremely jealous person I have struggled with depression on and off for 4 years but I'm now starting to think I may have BPD because my mood changes frequently and I'm just lost can someone please just guide me into the right direction

sorry for this mess of a post I'm just really unsure