I don't kno wat I should Do?

I kno it doesn't matter who gave the std 2 who, I jus wanted 2 kno. Because it seem like I'm onli really puttin his stuff, that I had let go 2 the light because I kno I'm guilty too, and I really didn't wanna have 2 tell him I cheated on him. Because with all the stuff he did he might jus hav 2 com out and tell me that he cheated on me. I guess wat I'm really tryin 2 D is save my relationship. I know that sounds completly stupid, because everyone agreed he cheated on me, but I'm not perfect either, I made ∀ mistake, and I don't wanna tell him because he might leave me. He already knos that if he cheated on me I'd stay because I feel like we could get through it, but I'm not sure he feels the same way. Guys take cheatin differently. I know this is kinda gonna sound like ∀ low self esteem issue, and in ∀ way it might be but that doesn't change the fact that I love him with all my heart, and I still want to be with him 4ever?