My girlfriend and I have been dating for 6 months now. It has been a while since I have been in a relationship. In every relationship I have ever been in the girl cheated on me. I have always been taught to treat girls with respect and so I have always worn my heart on my sleeve and made them feel like a princess, especially my current girlfriend. I really feel like she is the one, but there are times when I question her actions. She was the first to say I love you, and i of course followed up right away because i really do love her. I have met her family and she has met mine. Her family is awesome and they really seem to like me. My family thinks she is a great girl. All my friends tell me she is a keeper. Now when she introduces me to people she never says this is my boyfriend Mark, she just says this is Mark. There are also days when it seems like she doesn't want to talk to me at all. She has a second phone, but she says its for work. She also claims to be a very private person and she will delete things off of her facebook wall, why I don't know. Recently she claims that she has an infection down in her area and so therefore we can't have sex. She got this infection in the beginning of May and so we couldn't have sex according to her for almost 3 weeks. Last week we had sex and she says the infection is back. She says it's going to be another three weeks before we can have sex again. She tells me not to worry about the infection and that if her doctor tells her it's something bad then she will tell me. We only see each other on the weekends because our work schedules don't really match up during the week. However lately I have seen her during the week. The biggest thing for me is that at times it seems like she just doesn't want to talk on the phone. She will text me good night or if she does call me she will call and say good night and that's it. On those nights we will have barely spoken during the day and she will not even ask me how my day was. I always ask her how her day was. We are both 28 years old and I really don't think she would be wasting her time or mine if she wasn't serious about this relationship.  Could this just be my insecurities and my experiences from my past relationships getting the best of me? I would greatly appreciate any advice anyone could give me. Thanking you in advance