Normal or not

My boyfriend and I have been together for half a year now, and we're in love. This is my first serious relationship and his the second guy am dating, sometimes I feel like I don't ever wanna be away from him, I get all grumpy and moody cause I miss him, but then other times i just don't feel it, I don't feel us. Like I literally don't even feel like talking to him. Is this normal or not. I feel horrible because his such a great guy, more than I could ask for😪😪.advice please.