Feeling depressed about my relationship doubts

Hey tsr, sorry for the novel but Im feeling a bit crap at the minute. My girlfriends at work and Im at home, I just met her for lunch and had a nice time but Im so worried about what will happen in the future. Basically we have a very nice, sweet relationship, highly compatible, good sex life, and everything seems fine on the surface, we've been together a year and a bit. But for the past 2 months I've started to have doubts, I've started to notice other girls, and Im not sure if Im ready for a serious commitment. When I say I notice other girls, I dont mean I'd ever cheat on my gf, but I acknowledge that these other girls are better looking than my girlfriend. She's also 5 years older than me, Im 20, and it hasn't been an issue untill now, but now that I'm having these doubts I'm starting to notice she looks a bit older. Its like Im wearing the opposite of rose tinted glasses. Im wearing paranoia fueled glasses, driven by my doubts. Im not constantly worried about this, last week I was fine, its come and gone over the past two months, but I'm worried it'll persist and become stronger. I do love her so much and I'd hate to break up with her, it would break both our hearts, but I also think in the back of my head that I could eventually learn to love someone else ( I dont really believe in soul mates) so maybe I should break it off with this girl because I'm too young for commitment, and try find another girl like her when Im older. For what its worth Im hoping someone on here will be able to tell me that they were in a similar situation, they stuck it out, and the doubts faded. I really hope it works out and I dont break up with her. She's my first girlfriend aswell, I think I need to hear someone elses experiences (because of my own lack of experience)

Put the internet to work for you. via Personal Recipe 2629979