Good morning! I hope that I will be able to help you! It sounds like you do have an overall healthy relationship! I am curious as to how you have communicated in the past about the sexual interactions and your satisfaction. Have you ever heard of the "Five Love Languages?" There is a book and also several links available regarding this. I will send this information toward the end of my answer. I'm going to provide you with a brief description of each "language" first followed by the link for you to be able to do the quiz at home and possibly have your partner do the same! It is helpful in knowing this because your awareness can help you ask for love and offer love in the "language" that you and your partner most understand or need.
#1: Words of Affirmation
Actions don’t always speak louder than words. If this is your love language, unsolicited compliments mean the world to you. Hearing the words, "I love you," are important—hearing the reasons behind that love sends your spirits skyward. Insults can leave you shattered and are not easily forgotten.
#2: Quality Time
For those whose love language is spoken with Quality Time, nothing says, "I love you," like full, undivided attention. Being there for this type of person is critical, but really being there—with the TV off, fork and knife down, and all chores and tasks on standby—makes your significant other feel truly special and loved. Distractions, postponed dates, or the failure to listen can be especially hurtful.
#3: Receiving Gifts
Don’t mistake this love language for materialism; the receiver of gifts thrives on the love, thoughtfulness, and effort behind the gift. If you speak this language, the perfect gift or gesture shows that you are known, you are cared for, and you are prized above whatever was sacrificed to bring the gift to you. A missed birthday, anniversary, or a hasty, thoughtless gift would be disastrous—so would the absence of everyday gestures.
#4: Acts of Service
Can vacuuming the floors really be an expression of love? Absolutely! Anything you do to ease the burden of responsibilities weighing on an "Acts of Service" person will speak volumes. The words he or she most want to hear: "Let me do that for you." Laziness, broken commitments, and making more work for them tell speakers of this language their feelings don’t matter.
#5: Physical Touch
This language isn’t all about the bedroom. A person whose primary language is Physical Touch is, not surprisingly, very touchy. Hugs, pats on the back, holding hands, and thoughtful touches on the arm, shoulder, or face—they can all be ways to show excitement, concern, care, and love. Physical presence and accessibility are crucial, while neglect or abuse can be unforgivable and destructive.
I suggest speaking to him in a manner that is vulnerable and explaining why the sexual relationship is important to you. I would explain with an openness that you to feel self-conscious because you love him and hope that you are able to satisfy him in other ways. It can make a partner feel rejected or hurt when the physical interest does not feel reciprocated. I am including a link about increasing intimacy in a relationship. There are other options other than sex to increase positive touch.
Let me know what you think :)