Why am I so nervous around my girlfriend?

Maybe because she is your first girlfriend and you're unsure what o do. Maybe she does things that make you uncomfortable because you're not used to that sort of thing.

You may notice that you have strong feelings for her and that can cause you to become afraid of messing up.

We can often get nervous around people when we care a lot about how they think of us. Chances are if she's your girlfriend, you really care about her opinion, so that may be why :)

At the time I was dating a girl. I always felt like the upper hand was gonna be pushed aganist me. I'm not very popular in my school and I always thought that the people in my school where gonna tell her that I was not good enough or anything in particular. She tried to assure me that wasn't true (At least at the time it wasn't.) but it was always that gut feeling.

It takes time to get to be comfortable around anyone, this is especially so when it's someone you really care about.

Well if you really like her, it may be because you are scared to embarrass yourself in front of her. It could also be because of something she does that makes you feel uncomfortable, it all depends on the situation at hand.

Because you love her, she may give you a little anxiety but thats only because you dont want to mess up around her

It's okay to be nervous. Most people experience nervousness in their lives in some level or in some situations. It's a combination of excitement and fear. You may want to ask yourself "Why do I feel afraid around her?" and see how reasonable your concerns are, which may help alleviate your nervousness. Think: has your girlfriend ever seen you without your nervousness? It's important to be in an environment where you feel comfortable being yourself and being loved as yourself. You deserve happiness, and the very fact that she is your girlfriend is proof that she's curious about the real you.

probably because you are in love and dont want to screw it up or you are hiding something..the question is vague and would need more detail

Maybe because you are afraid to be yourself around her because you think she is not going to like you for who you are. You are most likely afraid of rejection. Maybe you think you are unworthy of her love because you have some insecurities about yourself. But thats okay, that is normal, alot of people feel that way,even myself.Try focusing on yourself first before starting any close relationships with people. Learn to love yourself first for who are.