You can simply say that it's obvious that the people around you don't really want you to get married/get a girlfriend, and society and women as a whole definitely doesn't want that. So why would you fight against them all? Especially when casual sex is so easy to get?

If they press further, you can elaborate that the thing they are asking you to do isn't rewarded by society (in fact, it's commonly punished), and you don't really think the people in our society want men to get married anymore because if they did, they would try to make it appealing and rewarding.

You can just say that you don't really think women want to get married anymore. If they really did, why would they reward bad boys and Chads but then make life miserable for Billy Beta? It would be one thing if they had a few flings with bad boys but then settled down and were otherwise wonderful wives, but the opposite is true. Why would they let themselves get so fat and unpleasant after marriage? Wouldn't it be the other way around like it is in countries where men are valued for marriage more? Obviously they just... don't really want it that badly.

Say that actions speak louder than words and that the actions of everybody around you – including the person trying to interfere in your business, communicate that they don't REALLY want you and other men to get married or else they would be doing something to make the situation better. Ask them how many times they have done basic things like raise awareness about inequity in family courts or men's rights issues. Ask them how many women they have encouraged to give more custody of their child to the child's father.

If it is a man, ask him how many times he has used positive peer pressure to encourage women to lose weight, stop nagging, and be more sexually eager with their husbands. How many times has he spoken out against feminism or helped men overcome professional, legal, or relationship hurdles with the aim of specifically helping the man come out on top?

If it is a woman, ask her how many times she has called out bad behavior among her friends or helped a man she knows discover cheating or disrespect committed by his partner. Ask her how often she stands up for men when her friends are talking shit about us. How many times has she even encouraged a man in the past week and shown appreciation for what he does as a man specifically? When was the last time she publicly acknowledged that women get tons of support and encouragement from media, academia, and government while men get shat on?

Sometimes an isolated community will value men, but not usually. Most people in most areas in the West take men very much for granted.

In conclusion:

When you are truly valued as a man, people around you will make it so obvious that it will be like a slap in the face. You will receive open respect, submission, and kindness, and not only from women, but from the men around you who want you to marry, procreate, or enter into relationships. Until then, do what is in your own best interest. And as you focus on yourself, grow, learn, and gather resources, you will be amazed at how quickly people start valuing you more. Until then, shrug and say "Well, you obviously don't REALLY want that. Otherwise, you would DO something to help support and encourage people like me instead of just talking."

Until next time!