The conscious choice of not having kids is a very mature one.More responsible than having them just because “that is what people usually do".
Plans for 30 or 40 years ahead, are meaningless.There is no guarantee that these plans will come true.
The only thing you can control is “now". You don’t have to prove anything to anyone,but yourself.
Undress yourself from all the things other people want from you,from every label you or they think you have to “surve" and just be.Just be.In every “now".
Sail with life as it is in every “now".This way,when that “now" finds you at your seventies(for example),you ‘ll be so full,you will not necessarily need someone else for not feeling alone.You will feel full.Because you will have lived many many “now" with respect to what you wanted.
Family isn’t just marriage and kids. This is just one of the options. Family is people who love each other and accept each other as they are.