No sex or terrible sex (you are not ready, wet enough and by the time you are, it's already over)

I have been married 2+years and been in live in relationship with my husband for almost 8 years before getting married. And I hoped it would get better after we got married but it's still the same. Ha ha. I have had sex only 5 times (not sure could be <5) in last year and I think once this year. I want some affection and touch. And I sometimes wish to just go and have an affair or something because I don't think he is interested in me. And sometimes I just want to be seen, felt and touched. Something anything. I would have left him but we have a son and I don't want our family to break up.