Do I give him a second chance?

Kay
3 years ago I met a man who I developed a major crush on. (Like the high school level low key obsessed kind) and we dated on and off for a year. He was in the army and was being deployed so he ended it. 
Well then his orders changed so he began dating someone else. Felt like my heart had been ripped out through my throat. So I cut off all contact and eventually moved on. 
2 years later (aka two weeks ago) I ran into him at a bar. 
And we ended up dancing all night.  And now he's wanting to take me on a date and I'm finding it hard to justify going on a date with the guy who tore me to emotional ribbons. But like people change right?
I definitely still have feelings. So my conscious is all like "you idiot"