I need some tips to be more intimate with my husband

We have been together 3 years and married for 1. Our relationship has always been fun, we laugh, we play jokes on one another, but he isn't really into sex..never has been. I have asked him if he was gay and afraid to come out he swears its not that. He has only been with a 2 others before me, and I guess he was the same way.

I can't say that we never have sex because I am pregnant for the 3rd time (we have experienced two tragic losses before this angel).

But I always an the one that initiates sex, and most of the time I am getting shot down. That can be pretty soul crushing after awhile. Has anyone else experienced this? Is there any tricks or tips you can provide? I feel like I've tried everything...