I need advice . I've been friends with a guy for two years I've never liked him more than a friend…

I need advice .

I've been friends with a guy for two years I've never liked him more than a friend and still do not he told me he had a crush on me and I said thank you but you know I'm in a relationship and than he sent me a picture of his dick ... I told my boyfriend and blocked him off of my phone but I feel so guilty because I feel like my boyfriend is mad at me and I feel like I cheated even though I didn't ask for it nor act on it ..