Hi,
No offence, please, but you only suspect, without having hard evidence. Is it possible that you are over-reacting ? Let's go one step further: Assuming that it is true, have you any idea what is the reason(s) ? Did you discuss it with him (open and deep) ? Did you try to get a proffesional marriage counseling ? No offence, again, did you have any contribution to that ? What can you do to overcome it ? So many questions required to get to a full answer..... I wish it had a simple answer (e.g: wear sexy penties .....)
Best regards,