Many men carry an unabated sense of not living fully sexually around with them, whether they have a partner or are single. To be honest both to yourself and to your partner - what do you feel that you are missing? What would you like more of? Are you doing anything you don't like?
Only you can get the life you really want. Do not expect anyone else to fix this since only you can change things.
There are good books that show you how to increase the quality of your sex life. One guru in the field, for example, is Mantak Chia, a Taoist master who has written several books on how to get better control over orgasm and ejaculation, which also explains why there is a difference between these two for men as well:
Many men are unhappy about, for example, suffering from premature ejaculation. This can be worked on by using the right exercises, such as this:
Many men are embarrassed by their sexual problems and do not know who to turn to. But there is help to be had both for erectile disorders and for other sexual problems. If you do not know where to go, start with a visit to your family doctor for a referral.