Not sure what to do. I have a boyfriend who is a little...okay a lot immature.?

Im in a relationship with someone who I sometimes feel that I am "in love" with him but other times I see how immature he can be and it makes me not want to stay with him. He laughs and talks about incredibly stupid childish things but he is very bright and knows a little about a lot. He's 20 years old and considerably good looking he cares a lot about me and would do anything to make me happy but I am unsure if I should continue seeing him. We've been together for about a month now and I'm just starting to realize how immature he really is. I have been thinking about sticking it out and see if he matures but I feel like it wouldn't be worth the wait.