I'm in a situation that is stressing me out and isn't helping my bpd.

My ex of 7 yrs is moving city in a couple weeks. We broke up 3 yrs ago but are still on good terms. We don't speak often but he told me recently he was moving and it would be good to see me before he left; which is fine I said yes. 
He asked me when I was free and I told him when. Now, I've been left on read for 5 days and feel quite agitated by it since he was the one who suggesting meeting in the first place and now I'm being ignored/rejected??? 

It's making me feel crap and is bringing up memories of all failed friendships/relationships. I'm trying not to let it get to me cos really why should I care? I shouldn't be making such a deal out of this. I want to message again just to see what's going on but worried it'll make me look needy and annoying. Should I just let him be and try to forget about it or go to message again? TIA