Is it normal that i don't love my mom?

Okay so i just moved in with my mom. We used to be so close but were separated for 8 months while she went with her boyfriend. We saw each other a few times a week. I felt like I should miss her more but after a month I really didn't care. I've been living with her for not even a month. I myself have a really bad temper and mom just loves to ask questions. I feel like I don't love her anymore. But i feel so terrible for being like that. We were best friends. And she does a lot for me. Now I don't care to even be around her. Is it cause of age? I have no idea...