Sported many beta qualities throughout high school but have been improving since: bulked 30 lbs, dressing better, more socially outgoing, etc.

Started seeing a girl my first semester of college and I really like her: 'good girl' type, virgin, reserved, etc. Always talks about me with her friends (mutual friends, so it gets back to me), either I sleep in her dorm or she does in mine every night. I want to move things into a relationship but I have a few questions/concerns

I began noticing that I have let her effect my emotions too much. I was really happy before, and am more happy now, but I'm beginning to let my emotions take over more which I don't like. If she were to leave me now, I'd be upset for a while I can tell.

*How do I keep seeing her while not letting these things effect me as much?

*Is it wrong to spend too much time with someone you're seeing?

*Best way to move things into a relationship without having to spill your heart out?

*What kind of qualities, acts, behaviors, keep your women around where she'll be thinking about you when you're not around to a point where you're not jealous when she's talking to males?