Relationship Advice...it's been awhile.

Hi Fluther. Glad to be here. I need your input!
I have been in contact with an old school acquaintance of mine for about a month and a half now, after more than a decade of not being in touch.
Our conversations have gradually increased in frequency and we text/email many times a day…sometimes flirty sometimes just run-of-the-mill. He’s made indirect references to being into me, and I’m kind of into him, too.
This week he’s tapered off quite a bit and I’m wondering if I will just sound like a needy girl if I ask him what’s up? Perhaps he’s scared? I know this sounds juvenile, but I’ve been out of the dating game for a bit so cut me some slack! Thanks for your honest help in advance.