I love my gf, but we have very little in common. We have lots of shared experience but little shared interest. We differ on important ways too, on religion and things like that. We've had issues with mismatched sex drives that persisted up until recently (we see each other a lot less so when we do see each other we are both ready to go at it). I love her, but it's hard. We were long distance for an entire year and, despite some bumps, it more or less went well. I expected that to be the end of it, but we are longish distance again, and for some reason it's just not working this time.

I met a girl recently. We obviously have fewer shared experiences, but our interest overlap is uncanny. She actually gets me and my interests. I'm a geoscience major and she's a geophysics major which are very closely related, it's awesome to he able to nerd out over the same stuff together. Physically and personality wise she's totally my type. Now I have a gf and she has a bf so I would never act on any of these feelings, in fact I actively try to dispel them out of respect for my gf, and I never hang out with her alone unless it's somewhere very public like a major library or something.

I don't know what to do. I'm not sure if I could see myself marrying my gf, and we are into our second year dating, so I'm worried we're wasting our time. She has said multiple times she can see us getting married and I always just respond with "I don't know its too early to say". At the same time, I'm worried subconsciously I'd be breaking up with my gf because of this girl or the prospect of other girls. Also I would lose most of my friends. Our relationship isn't bad. Its not anything. We are so distant, I call her and tell her I love her, she calls me and tells me she loves me, but it just feels off. Especially without a strong physical element. It's gotten to the point that when we finally are alone again being physically intimate feels uncomfortable and makes me really nervous. What do?