<human>: Could you distill the essence of the text into 1-3 sentences?

I am starting college soon and my girlfriend of 5 months who has been cheated on and left for other girls by her ex's has been worried sick that I might meet another girl in college or cheat on her.

Well I hate her worrying about things. So I told a lie/story that I was at a party and there was a drunk girl hitting on me and trying to get me to have sex with her. I told her that I refused the girl and left the party that instant. Thinking that this might reinsure her that I would never cheat on her or leave her. Then she asked the name of that person and me being dumb threw in a name of someone who graduated a few years back THAT SHE KNOWS.

Even though this may have reinsured her, she did seem a little frustrated that I hadn't told her this before and that she knew this person.

This girl is the love of my life and I've never lied to her before and I feel completely awful about lying to her and that I frustrated her and that she might find out later on that I lied to her. Should I tell her the truth or would this just end up damaging the relationship if I told her the truth?
<bot>: I lied to my girlfriend and I feel bad even though it was intended for her benefit I feel completely awful. Should I tell her the truth?