<human>: Can you give me the gist of the text in a nutshell?

So my girlfriend and I have been together for almost two years and next year I start Uni (she's already been for a year), I love her more than anything, she's my soulmate. 

Lately I've noticed myself craving more sexual encounters, to test the waters so to speak, and its made me realize I may cheat on my GF at Uni. Ive only had sex with two women in my life (her included) and she's had sex with maybe 7-10 guys before me (which makes me feel as though she is satisfied, whereas I am not). I feel as though if I don't explore more now then in 30 years when we are married with children, I may cheat, which in my opinion would be WAY worse. 

What I'm asking is, from a Woman's perspective, is this a valid reason? I know it makes me seem extremely douchy but I'm truly just trying to find a way to ensure we have long happy lives together. If not what would you want someone in my position/what would you want, to do? Breaking up or ending things is not something I want to do.
<bot>: Feeling unfulfilled with my sex life, if I don't Cheat in Uni then I may cheat when we are married with children = EXTREMELY bad. What do I do?