Is it really bad to act like your boyfriend is your best friend?

My boyfriend and I have very similar likes and dislikes, interests, hobbies, etc., and I hang out with him normally, (Not kissing etc 24/7), and enjoy myself when he is around. We talk about normal things, and then the deeper stuff, and I really feel he isn’t only my boyfriend, but one of my best friends. Is this thinking really so bad?