Just venting

I've been with my boyfriend for 11months we have a good relationship not really any problems problems but it lacks alot in affection I work during the day and he works at night. We don't live together but he comes over when he can. I cook and we watch movies together. Before we got together, he explained to me that he had a heart condition, I was willing to take on that. But its limits everything we do, I just want that affection that we lack I try to show him that but it never last long. I wouldn't say I'm not happy I just feel like my relationship is missing one of the most important things.