Roughly your age. All my life. Because I my family was poor and moved around alot so I never had the opportunity to develop passions or intrests and was always lagging behind everyone in life. Now that severe depression has manifested itself as constant part of my life, there is no chance for me to ever have a healthy fulfilling relationship without dragging the other person down with me. So I just stay at arms length with everybody.
Also at my age, if heaven’s forbid there is still somebody who’s also single without kids, then just like me, there’s a good (bad) reason for it.

At least I don’t end up as one of those 40 something year old steering head first into their 3rd divorce. I probably won’t even end up as a 40 something year old, period.