<human>: Condense the text into a few key points

ME = 27
GF = 33

I left my wife in October. We had been married for nearly 5 years. We just became different people and our relationship lasted much longer than it should have. We have mostly reconciled and are moving on separately just fine. 

However... I met someone in December and have been spending a lot of time with her. I spend most every night at her place. Things are going decently well and we get along great, but I'm beginning to think that we should just be friends. I'm beginning to feel suffocated and constricted in what I can think or do, etc. I had the same issue with my wife and I tried to hold it in for a long time, but I eventually snapped and we got divorced in an ugly way...

My new girlfriend is my best friend. Maybe my only friend. We get along great and maybe if the timing was better this relationship could turn into something bigger, but I don't feel like I can be in a relationship right now. 

So ya. How do I tell her that I want to keep her in my life somehow without hurting her too much... I really care about her, but I know I'm going to REALLY hurt her when this goes down. She told me she could see me as the father of her kids, etc. I also sometimes think she could be someone I could be with for the rest of my life. And I've told her that. I don't know if I'm just scared of commitment or if this is a relationship that won't work for me.

Just really scared I guess. Any ideas? Anyone go through something similar?
<bot>: How do you properly ask for space when you aren't sure if you actually need space or just need to be single?