It sounds counter-intuitive, but spending time apart makes your relationship stronger and far more exciting. It's healthy to miss one another.
You are both unique people with your own goals, interests, and friends. Your lives should overlap, but should never consume one another's to the point that you do everything together and your friends sporadically question whether you're still alive.
Encourage each other's independence. Disappear every once in awhile. Do your own thing with your boys. Pursue every hobby you have with the same vigor you did before you got yourself a girlfriend. You'll feel more fulfilled, and she'll be more intrigued, and your relationship will reap the benefits.