Only asking this as i have been out of the dating scene for some time....

Got talking to a guy online & was very flirty & we met up for some fun a few nights ago... we both said about meeting up again... but since then he hasn't been as chatty or flirty... I took a chance & asked if he wanted to meet up this Sunday, I can see he's online but not seen my message... I have been asked out in a date by another guy for Sunday which I accepted as the 1st guy didn't get back to me...

Shld I message the 1st guy if he's still interested or just leave it alone?