<human>: To start off, if this is the wrong place to post this please feel free to direct me elsewhere. This is my first time here and first time trying to seek this sort of advice.

So I guess as a bit of back story, I'm 20 years old and go to university here in New Zealand. I've been kind of a socially anxious dude since about the age of 13/14 when I started high school which is fuelled, I guess, partly by the fact that I'm disabled and wheelchair bound which changes the way people see/treat me, but especially those of the opposite gender.

A by product of this is the fact that I fall way too easily for any girl that is both attractive and shows kindness/friendliness or attention to me in some ways, even if its purely platonic/casual. It's been the case since high school and has only ever ended poorly, either i get too obsessed and try too hard and become annoying or I become jealous and screw up an otherwise good friendship some how.

The latest of these infatuations is this girl in my University course. She's really kind and nice and all that good stuff, we get on quite well and consider each other friends. Only problem is she has a boyfriend of like 3 years and I'm the dude in the background who she'd only ever consider a friend as far as I know.

I guess what I'm trying to say and want to get help with is trying to break this cycle some how. I can feel myself starting to get those feelings of being down and self destructive thinking and need help just snapping out of it and remembering that this isn't the only girl I'll ever meet and that its not the end of the world If i don't end up closer with her.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: I have a problem with fixating on girls far too easily and often spiral into destructive ways of thinking. Need help breaking this habit and focusing on myself more.