Marriage is a sacrament Lanya and should not be entered into in this case (in my opinion). Being socially acceptable or feeling that one has a social duty is not enough to make a marriage.
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In my opinion, also.
But the problem exists: If you reach "a certain age" which is different for men and women, for ethnic groups too I guess, you get asked a lot why you aren't married. Men get passed over for jobs, I hear, because they aren't married. Haven't shown they have the stability of a family. Single women are called dykes. Single men are either "confirmed bachelors" or the question arises if they are gay or not.
So many people do get married even though they shouldn't, they aren't attracted to the opposite sex. Then the families are happy, the people aren't socially ostracized, they can move up in their jobs, etc.
I fail to see how homosexuality could be thought of as a choice one makes. It is just too hard a life to choose freely. I maintain one is born that way and struggles to deal with it the rest of one's life.