Lonely

Is it really that hard to understand that I'm lonely? Is it so wrong for me to want to be with the guy that makes me happy? I mean I have been stupid in love with the same guy for 4 years and all I can get from him is some grat sex and pl=ease don't get too attached to the family becaused you wont ever really be family. I love everyone in his family from his mother(who would be the dreaded mother-in-law) his Father(papa tony) his Dad (Jose) Jojo Ashley even his stupid dog that hated me. I don't get it I don't understand why? He says I used to be strong and that I used to be the girl he fell for. What changed? How did I change?