Before I was married, more than one person ask if I was gay or alluded to it. I'm not femine but single guys in their early 30's are looked upon with suspicion. I went to my 15th year reunion single (even though I broke up with my long term GF shortly before-over my strong stance on no kids) and one gal asked "What is wrong with you that you are still single, you are a good looking guy"
Besides being lonely it sucks to be single in many ways in how people see you or treat you. Plenty of my married guy friends said their wives looked upon me warily I was going to talk them out of marriage via telling them how great single life was. In all truth I always thought single life sucked.
@Unlimited
For many years it sucked, especially in my 30's and early 40's, though that was the time I dated the most I hadn't gotten married.
Since Obama, things have changed. The social fabric has disintigrated, exacerbated by social media. People have changed, and from my angle, women have changed. If life ever got truly economically serious with even some civil breakdown, there aren't many I'd trust anymore.
I don't mind being single now. The lack of children sucks at times, but seeing the strife of many marriages because of societal degradation, it's a pretty risky venture at this point in time.