I’ve been through this and only recently have things got better. With the help and intercession of Fr.John Hardon, things r better but I must be humble because at any point things can go bad.
If there’s is grave reason to postpone pregnancy you can practice NFP, I recommend Creightom model.
St.Thomas talks about the this in the Summa:The opposite of lust is not found in many, since men are more inclined to pleasure. Yet the contrary vice is comprised under insensibility, and occurs in one who has such a dislike for sexual intercourse as not to pay the marriage debt.
It’s grave matter to reject relations for this long. So many gave such good advice. If you need help PM me.