Is he really sick or is this an excuse?

My so called "friend w/benefits" that I've only known a month has been "sick" this last weekend. He hasn't been calling or texting me like he usually does several times a day. Friday night he told me he didn't feel good and had been sleeping all day. Saturday morning I sent him a text & asked how he was doing & he said ok & I told him if he wanted to do something later to just let me know. Saturday night he sent me a text & he was about to go to bed b/c he didn't feel good. Sunday afternoon I sent him a text to see how he was & he said he's sick as a dog and that he's been out of it all day. I never heard back from him and I still haven't heard from him yet today. He usually texts me in the morning and throughout the day and at night. Do you think he really is sick or is he just trying to let me go? He had said he wants us to be fwb & hopefully grow into something more...he knows I just got divorced. Any thoughts?...maybe I should give him a little more time to see?