I just happen to have two kids. I feel the same way, but it is not uncommon for people to get isolated when they do.
You are obviously in a different life situation than I am. Research seems to show a trend in college students and isolation. Everyone came from somewhere else (most of the time). It can be rare to see an old school friend if you've travelled to a new location.
The dating thing is a little suspicious, but all the answers lie in yourself. You know all the answers to the very question you are asking. I think you just need to look at and accept them.
Does the opposite sex make you feel embarrassed? Do you have a lot of anxiety around girls? Shyness is NOT something WRONG with you. As a matter of fact, many girls appreciate a guy who isn't boisterous or loud. ( My fiancee claims he is shy and didn't have a serious gf until he met me a few years ago).
Look at how YOU feel about the situation and what YOU need. You are asking the question, so to me it seems you do have a void there.
I have a homework assignment for you...look at all the definitions of "intimacy"
Then ask yourself, "Would being intimate with another human being (particularly female) scare me?" Then ask yourself, "Do I know how to do that?"