If you think dating a girl will solve your depression problems. You are very mistaken. Your life should not be dependent on if you are in a relationship or not. Don't misunderstand I'm not saying looking for relationships is bad. Trying to burden your spouse with your entire existence (meaning I would fall into depression or die if I am not in a relationship) will always ware out that person and most of the time that relationship will end unless they are also co-dependent on you( I won't get into that sort of relationship).

First, find confidence in yourself and find meaning in your existence in your OWN eyes (not your kids,not your friends, not your spouse, not your parents,not anyone but yourself).

Then execute this reason for your existence even if it's just one small thing (I like to go workout, I like to hang out with friends, I believe in religion,sport,hobby). Sometimes it's good to place your existence on something that is not like an old bridge about to break but something that is strong, and sturdy

If you find someone along the way then good for you.