Adult sex life

My SO & I have been together three years and he’s done what any other man has done but I can honestly say he’s changing (physically idk about mentally) but as of now I’m starting to want to have sex with other people because I’m just now realizing he doesn’t really please me (I was googly eyes for a long time) but I’m SO FRUSTRATED!!! I’m tired of telling him I want my kitty licked on and really just tired of not being satisfied sexually. I love him and can be in love with him again but I’m just not feeling the relationship like that anymore.. we also have a daughter that we’re trying to stay together for( neither of us are financially stable at the moment). I just want some help or help on how I should go about things? I don’t really want to break up with him but I’m also just craving sex from a person I don’t even know about.