Her two best friends came to visit and and we were hanging out in my GF's room. It was her birthday and I had gotten her a present and it was also the first time I had met her friends so I wanted to know what they thought about me. I slowed for a couple minutes upon leaving to listen at the door and didn't really hear anything except that I did well choosing her gifts. I felt weird about being there and then left.

I've been feeling pretty guilty and was wondering whether I should tell her?

Do not tell her this. It reaks of insecurity and she will smell it off you. You will come off as weak if you tell her. You don't want that. So: don't tell and and stop listening to doors, it's creepy. Stop feeling guilty, you had a moment of weakness. This too shall pass.

Thanks for the advice, that hits it spot on, I've always been insecure about myself. I've slowly been getting over it over the course of this relationship as it progresses. But there are definite moments of weakness and I need to get over that.
I just feel guilty because I truly like this girl.

It's not as if you banged her hot MILF mom. Forget about it and work on your inner game, if you tell her then she will think you're an insecure wuss and the attraction will vanish.

hahah well put, and I know I'm being a puss but when I'm with her and we're having a good time stuff like listening at the door in the past creeps in and makes me feel guilty. Best ways to just forget it and move past it? This was also weeks ago btw. Thanks again for the advice fellas, first relationship and I've found I really don't know sh*t

You shouldn't be insecure man, you are a healthy young man brought to this world to life your life to the fullest.
Now you want to waste it becouse you can't get it in your head that nothing is wrong with you, that you can achieve anything in your life if you truly want it.. Who cares if you listened at the door, fuck that shit, you wanted to do it so what ? You just shouldn't care what anybody in this whole world thinks or says about you and your actions... I would suggest that you get your focus on improving yourself, getting you inner-self together, the girlfriend won't run away, you are far more important to yourself than she is.

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Heat

I say bullshit, tell her if you feel like it's bothering you not to.

You gotta listen to yourself man, not anyone else. My advise is, if you feel like you should tell her, then do it. Just make sure that when you tell her you do it right. Meaning, tell her you did it, and that you're sorry, you feel like you shouldn't have.

If your girl is a good girl, she'll likely be happy about your honesty, and your inability not to follow your conscience and do what you think is right, especially in the event you think you didn't do something right.

Go with your gut man.

thanks for all the advice fellas, the thing is i really DON'T want to tell her. I'm just a naturally sensitive dude and feel guilty a lot when I really care about something. I don't think its a big deal and I don't think I want to tell her. It would be an awkward conversation and that really doesn't matter because it's in the past. But guilt is creeping in making me feel like I should?