sad rant.

I've been with my boyfriend 4 months as of yesterday. Generally I get sick of people by four months and break up with them. But not this man I love him with every bit of my heart and soul and today he asked me "why do I feel this way about you?" And proceeded to take my pants off. We had sex and he just goes I finished. And walked away. He just scares me, i don't know what to do. I told him about my four month thing and he's been stressin about it but I have also assured him of my love for him. I don't know if he's just messin with me or if he seriously doesn't want to be with me anymore. Side note: I'm trying to quit smoking so I'm a little on edge and emotional about everything. So that may be playing a factor but still. Idk I guess I'm just ranting to rant. I should just chill tf out.