There is no way of predicting the future when it comes to an individual's sexual libido.
However, if the two of you are already having sexual issues, you shouldn't get married until the issues are settled.
Differences in sexual frequency, desire, preferences, fantasies, masturbation, pornography, expectations, etc. will tear the two of you apart. If you and your partner are unable to talk about the issues, or if your future spouse doesn't see any real problem, or doesn't want to talk about sex with you, cancel the wedding.
