You'll be a bit brave doing this. Taking a first step after long time has past always feels awkward. Not just because you cannot predict the outcome, but it has no natural starting point, you just have to "do it".

I do think it sounds like a good thing, it doesn't sound like either you were to blame for losing touch, sometimes that just happens and suddenly time flies. So I hope it will be a good "reunion", but if it was me I would probably have a small breakdown before I dared calling.

Good luck.