Recently I've noticed that my girlfriend Seems more amused by the other people with us than me. When I take her out with my friends she seems more entertained by them, but then later after I take her home she'll call me and tell me how much she loves me. Today I was hanging out with her and her cousin and they seemed to have a great time together while I felt like a tag along. Once we left her cousins she quieted down and almost seemed bored. Is she still having good times with me? If not how do I fix it?

Have you asked her these questions?

She is probably taking notice of her surroundings so as not to be rude, if she spends more time with you... than any of these other people. Don't take it personal.. just engage yourself more in the conversations, and don't act bothered by it...