Oh man, I got dumped over text once, too & does it EVER suck sweaty llama toe! It's just so cowardly! Either way, be happy you're rid of such an immature
jerk... ahem, I mean
person...
As for "being good with rejection" - who can you name that IS?! If you need it, take a couple of minutes to be upset, then cheer yourself up by eating chocolate, drinking diet coke until you're jittery

, or going out with friends -whatever works for you.
How does that saying go? Something about, "The best revenge is living well"?

Things have a way of working out for the best...