What is happening? Help!?

I have a gf and we live in separate cities, around 10 min. away. I don't see her Tue-Thur, but I always see her on Mon and Sun and sometimes Sat and Fri. When I found out she liked me around 2 months ago, I found out she was crazy about me, making songs, reading my stuff on fb, and so on. Now that we are together, she is always busy on the weekends and she tends to hang out with her friends more. I love her to death, but she is always so busy. One time I asked her why she was so busy and she said that she didn't want to ruin the relationship between her and her friends. (Her parents were in love and ruined friendships) She still likes me and we are going on dates usually on Sunday, but even then she seems distracted. She isn't very into doing anything beyond hugging. What is happening?