I'm just 'curious'?

this colleague i got to know and became close to during his stint in my workplace left ystd. e day before he ped me his number and just before i knocked off, i left him a note saying it was nice to know him blah blah blah... and my number. while he was taking his wallet out to pay for our last dinner, i saw e note i wrote him tucked inside it. anyways, now im just 'curious' and it's a silly question but does tat mean anything? =) i miss having him ard but im afraid since he's was with us for only 1 month, he'll probably forget abt me and all tat keeping in contact was just superficial u know wat i mean?