Having been single for about 3 years now, I think what I miss the most about having a girlfriend is the silly stuff. Sure, the deep, intellectual or philosophical discussions are great. The physical aspects of dating are great. Always knowing that when you want to go out and do something fun, someone is going to be there, ready to go, is great. What I miss is having the opportunity to try something new, potentially making a complete fool of myself, and knowing that, regardless of success or failure, someone will be there, laughing along with me, at me, or for me, but always accepting me.
It's been more than three years since I had that. My last girlfriend gave me the happiest, healthiest relationship I've had, but I got out when I realized just how unhappy I was and how unhealthy she was for me. Abuse comes in many forms, but now I want to try again. I've had a few years to reflect, and now I'm ready. I just need to find someone who fits me. I guess that's the hard part.