I've been dating her for almost a year now, and I love her. Sex is okay, but I really enjoy spending time with her and I'm happy enough.

However...

There's a guy in one of my classes who I desperately want to fuck me.

I've never had a doubt that I'm straight in my life, and all of a sudden I become friends with a dude in my class, and I'm ridiculously into him.

We were friends, standard enough. We would play games online together, he invited me over, and that's when I started feeling things. It really sounds so gay when I type it out, and I didn't even know that I had the capacity, but... his smile kills me. I find that my heart is beating fast when I'm near him. Lately in class I've been unconsciously watching him. These days, every time I see him run his hands through his hair or see him stretch, revealing the band of his underwear, my dick aches.

I don't know when it turned from a slight crush to a full blown attraction, but I just masturbated and thought of him fucking me the entire time. I've never even been too submissive, but every time I picture us having sex he's always on top.

I dream of him biting and running his tongue up my neck. I wanna feel his hands all over my body as we grind together. I get so painfully hard thinking about all the um... rubbing. I want him to spread me open and take me in his mouth, oh god I want his tongue so badly. I want him to fuck me hard and fast like he owns me, and I want him to make me his little bitch. I wish i could make him cum with my asshole as he looks right at me, pinning me down.

I think such filthy things every time we are talking about something as trivial as video games or music. I want to hear him moan and I want him to absolutely wreck me.

I know it will never happen, because he is straight, has a girlfriend, and I also have a girlfriend who I love very much. I've just never felt this sexually attracted to anyone in my life, including girls.

I'm probably imagining it, but I feel like he might like me too. He hugs me upon seeing me, and not like how I've hugged guys in my life. It sort of lingers. Lately they've gotten closer and tighter, and I can smell his cologne which drives me crazy. I didn't even know that cologne could have an effect on me but when it's on him...it's different.
Lately his texting style has changed from friendly and neutral to somewhat flirty. He sends a lot of kissing emojis and invites me places a lot more. The thing he said which drives me the craziest is whenever we were showing each other pictures of us in high school and when I showed him mine, he said "Oh wow, you were hot then too haha".

I needed to get this all out because it's not like I can tell anyone. I'm hoping this will pass after the semester ends but I want him so badly.

So I guess I'm bi then?