Long story short: Met a guy on Plentyoffish.com. Sent a bunch of emails and met up for drinks. Had an awesome time, lots of laughing and joking, touching and flirting. More talking and major goodnight kiss, followed by promises to call and hang out again. He called and we talked for more than an hour. I called him a few days later and we talked for more than an hour again. Made plans for Sunday before Labor day and this Saturday. (this happened 2 weeks ago). He was sick on Sunday, so no date. Texted him tonight to see if we're still on for Saturday and now those plans are cancelled too. Is this it then? Do I keep trying or let it go?

EDIT: Thanks for the advice so far. I'll give him one more call in a few days to try and make plans and see how that works.