Tight V: Normal?

We don't have sex often, probably once every two weeks but sometimes we go longer than that. When we do go a while without it, it is harder for him to do what he has to do because I get so tight from not having it. It takes a while for us to get into it and sometimes it's painful for both of us. Anyone have any tips to avoid the pain and the constant adjusting? We were both virgins when we met and even though we've had sex for over 2 years, I still feel like we're inexperienced.