He dumped her for another girl on valentine's day. 99% of people would want nothing to do with Him after that.

Sure, he realises he fucked up. But this isnt Hollywood. In real life, regretting that you were cruel or stupid doesnt magically make it OK or win you the girl. In real life? When you fuck up? You normally dont get to try again.

It's been a year. I guarantee she will almost certainly be either sewing slmeone else or wanting nothing to do with him.