I need help...

Been with my husband for over 5 years and recently lost interest in sex. I don’t know what happened. I feel like I just got tired of begging for sex and attention because he didn’t seem interested in me. I know he watches porn and stuff and made me feel bad, like unwanted. I felt like that for far too long. He would go and look up women, or even go on social media and look up his exs. He thought I didn’t know, but I always found out. I feel awful because I’m just not interested anymore. I tried too many things in the past to keep the flame going, but he just was not interested. Now when he wants to have sex I just pretend to be sleeping it really tired. I don’t know what to do...need advice please