not a virgin but don't want to have sex again

I've been with 5 previous men and haven't had sex since 2014. I'm with a wonderful man now and want to have sex with him but I'm just not ready. I want the next man I sleep with to be be the last and as we've only been together a year I don't think he is prepared to commit to that yet which is fine. My common sense tells me if he is the man for me he will wait and if he doesn't wait then I have to respect that and move on but inside me I'm so terrified of losing what we have I wonder if it's worth the risk. I love him so much and it would break my heart to loose him :( we've spoke about it before and he said he wouldn't want to wait until marriage but I don't think it's a marriage situation for me it's more the commitment of getting a place together, meeting the family etc. any advice ladies ?