<human>: My SO [24 M] and I [23 F] have been dating for four years. We have not had sex since last summer. We had one "attempt" at sex but his leg cramped up and it didn't go anywhere- he does not initiate sex, making out, etc. 

I would like to have sex more and have brought this up occasionally (and I was the one who initiated) but I don't want to create tension in our relationship or make him feel badly about it if he is not in the mood or unable to have sex for whatever reason (so I am reluctant to initiate). Whenever I bring it up, he says that he also wants to have sex more, but then nothing changes. 

Otherwise, we have a strong relationship. We support each other in our interests and pursuits, have many interests in common (hiking, video games, cats) and also different interests (I like volunteer work and am religious, he likes soccer/all sports). I will sometimes watch soccer or play soccer with him and enjoy it, and he will attend religious services with me sometimes. We are affectionate and always try to refer to each other sweetly (dear, sweetheart, darling) and have open communication. I really love him and want this to work out. 

At the same time, sex is also important to me, both as an avenue for emotional connection and for the physical aspect of it. I would prefer to be in a relationship with my SO in which we had sex, but I don't know how or if this is reconcilable or what to do to help repair this damaged part of our relationship. We are both working professionals now, but for much of the past year, I was a graduate student. We went to college together but he graduated two years before me (he went to school a bit young).

Give me a shortened version of the text
<bot>: I love my SO but we don't have sex (and I think this is important). What should/can I do to resolve this?