One of hallmarks of a Nice Guy is their women pleasing, and their drifting away or uncomfortableness with male relationships.
Huh, this one surprised me. I too have felt much more comfortable talking to women, though I have never ever grown a close connection to any woman while I was M, or done anything that should even made her concerned.
I almost forgot to comment on another topic, can't find it now but someone posted about not it being the right time to read relationship books... there were times for me that reading them felt great. Only on the days I was really hopeful that it might actually work out with W. Most days, they would cause more anxiety and I would dread the thought of reading one. So I think that it is normal, read what you want based on what you are feeling that day. For me I know there's no chance of a R in the next 6 months, and I have bigger issues to deal with now.