Not mature enough

Firstly Have found that guy I have been dreaming of . He is loving, caring, not a horn ball he is that type of guy you can see yourself forever with but just not now. I want to fuck and leave, smoke and be free, drink and be marry. I feel that I'm not suitable for him. Mabey I have found him just a little bit too soon in my life.  Sure he is an awesome guy but I want that kind of relationship when I'm mature enough to appreciate it.

Can anyone fill me on this?