Guy cancels date cause he's sick?

Anonymous
Please please take you're time and read this and help me out...

I know this question might seem really silly and irrelevant but I really need your take on this one, cause I have major trust issues and need to know if i should let it go or not.
So i've been seeing a guy a couple of times, we hang out and we have sex, and we get a long really well so I think we both kinda like each other (although there are no feelings there yet). We were meant to hang out this weekend, I actually asked him and he said he wanted to see me, but the same morning he texts me saying he's sick and that we'll have to hang out another time. I immediately thought he's lying and that it's just an excuse not to see me? I probably wouldn't still be worried if it wasn't that it has been like 4-5 days ever since and I haven't even heard of him. We both go to uni and have a lot to do everyday, but I'd think if you're interested in a girl, you don't cancel on her cause you're "sick" and if you do at least younsuggesst another time, OR you at least text her or SOMETHING in a couple of days, but I haven't heard anything. What do you guys think? Is this a sign in lack of interest or should I just relax? Because of this I keep checking my phone all the time and I'm scared to ask him again to hang out cause im worried that he isn't interested.
Thank you xoxoxo
Guy cancels date cause he's sick?
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