I lost my virginity cheating
Does that make you feel guilty?
I definitely feel guilty because I know my girlfriend deserves better..
It sounds like you made a hasty decision and now regret it.  This is why you need to make sure you're emotionally ready for a relationship before you get into one!  It'll help you avoid temptations like this in the future.
I'll take that advice to heart.
Good to see you have a good head on those shoulders. Use this incident as a good life lesson.