When do I close open matches?

I have these open matches from #18 and #19 that I went out with. Basically, after you're matched they just sit there open until someone closes them. I leave them open if I like the guy, and close them after the date if I didn't like him that much.

It's been weeks since I went out with both 18 and 19, yet they haven't called or closed the match. 10 did that too - didn't call but didn't close the match either. Are they all just afraid of hurting my feelings? I find that so odd.

So after a couple of weeks, is it okay to close the match? I mean, how long am I supposed to give them before I just show that I've given up?