Kinda cheated on gf...bit of a moral dilemma.

[GimmickAccount#7]

So I'll try to make this short...

Been with the gf > 5yrs, love her to death, plan getting engaged soon. I've never cheated on her before.

Last week a friend of a friend was visiting the area and I was asked to show her around. I never met this girl before. We had a good time all week and on the last night she was here I ended up hooking up with her (didn't bang her though).

Here is my dilemma...

I liked it. I like it ALOT. I probably would have [censored] her if I had the chance but the circumstances precluded me. I don't really feel guilty about it either.

So, advice from those who have been there/done that...should I be worried?

Like I said I love my gf to death and want to marry her, but now that I've fooled around a bit I feel like I want to do it agian.

Like I said I've never cheated at all before so this is all kinda new to me. Should I just write it off as a one time thing and go back to being faithful, or should I maybe get some fooling around out of my system before I actually get married? If so do I tell my gf or just see if I can get away with it?