Kink advice?

OK ladies, so here's my thing. I have been with my husband for 4 years now and I feel like he's starting to get bored with our sex (which probably isn't even true). I have tried to be more open with him but I seem to get in my head too much. He has way way way more experience than me. Including him I've only been with 3 guys and they have been completely monogamous relationships. He, on the other hand, used to be a meth addict and can't even count how many people he's been with (this includes guys as well). His "way of life" stopped about 2 years before we started dating, but I can't seem to get past the fact that I might be a little too boring for him. He's literally into anything sexual, if you can imagine it, he's probably done it already. Any advice on what I can do?