<human>: My girlfriend and I -- male, 20 -- have been together for 2 1/2 years and it has treated us both well. She is caring, supportive, good-looking and an overall great partner. 

I still have strong feelings for her, but there is another woman -- 21-- who has caught my attention. She is also driven, funny and very attractive and I often think about creating something with her. Not necessarily a committed relationship right away, but I've thought about taking steps towards it.

Back to my current GF...we have discussed marriage and living together, though logistics may get in the way. If she is "the one," I would feel terrible leaving her and not finding anybody who can make me as happy as she does.

My apologies if I am unclear, but I am very torn here. Advice is welcome!

Summarize the given text in a few sentences.
<bot>: Already have a great gf, but another woman is making my emotions flare. Want to make the right decision for the long-term.