Hey guys. Just a warning, this is kinda long due to the backstory.

I don't know if this is the right place to post this, but from what I can gather there's no real place to post questions about friendships so I figure this is likely the best place. Backstory: I'm a female, and I've spent most of my life as a loner. I'm also somewhat asexual and masculine - I call myself androgynous - and growing up I'd always play games like football and tag with my male classmates, and I never look even remotely feminine; most of my clothes are bought in the mens section because that's what I'm comfortable in. I don't wear makeup, or tight clothes - I don't even carry a handbag. I have short hair and I'm often mistaken for a man. That doesn't bother me, it never has. I'm comfortable with that.

Last semester at Uni I had classes with this great guy. Because we were the only ones who actually turned up to the lectures, we struck up a friendship. We had heaps in common, we liked the same games, have the same major (technology), mess around with the same sorts of thing on computers - we both love playing around with Linux systems - and read similar books. He rides a motorbike, which is something I'd love to have. We could talk for ages, and I was like "one of the guys" to him. We'd help each other with assignments, he was there for me when my grandmother died, I kept him company after our shared subject's exam because he felt worried over it...honestly, he felt more like a brother to me than my own brother.

I knew this guy had a girlfriend - he mentioned her a lot - and he knew I was no threat to them. I'm not interested in him at all. Most girls look at me and see that I'd likely never even be the type to ever have a boyfriend - people have always just automatically assumed that I was gay, because of the way I dress and act. This guy included.

Basically, we had a great friendship. And then, by chance, I went downtown one day and I ran into him and his girlfriend. I was with my mother on our way to have coffee; he walked past us and we literally nearly ran into each other. He introduced me to her, I introduced him to my mum (along the lines of, "this is ___, he's in my networking class") and then after that...it all changed. When I met his girlfriend, she looked me up and down. I'm used to that reaction because of how I look (I also have severe eczema and acne so my skin is quite damaged) and then was very, very standoffish. Again, used to that. I never get along with women easily because of how I am.

A few weeks after that, this guy and I had a class together. I don't have a car so I was intending on walking home, and as we walked out of the classroom together, he asked how I was getting home. I told him that, and at that moment, his girlfriend caught up with us. She didn't say hello or anything - that doesn't bother me much - but then he asked if I would like a lift and she full on glared at him. Again, absolutely nothing between me and him, and I am most certainly not a threat, especially considering his girlfriend is basically a blond bombshell!

But since then, its like my friendship with this guy just...disappeared. Despite me messaging him, he only talked to me during a group assignment and he full on snubbed me before our exam the other day; I was there earlier than him - because I walk, I leave way earlier just in case - and I saw him walk in. I waved, he ignored me. It's like that friendship we had has literally just disappeared and I don't know why; we didn't have a fight, we didn't talk about anything out of the ordinary. But the last proper conversation we had was when his girlfriend glared at him for offering me a lift.

Am I totally paranoid to think that maybe his girlfriend doesn't like him having a female friend and has told him not to talk to me anymore?