This guy wants sex with me in person...so is that maybe y he blocked me when came looking for him on Facebook to make me keener? ?

If he wants sex so give him sex
It’s that really hard to do !
Your virginity has been taken years ago and it doesn’t have any value so you might as well make the man happy

This is now your 255th question.  You would have to ask him, rather than having us guess at his motivation. However, playing such games as you described does not make for a good relationship. 

that could be why

I doubt it. He's probably found someone else to get his rocks off with.