It seems like she feels as such a long time has passed without talking, your feelings for her have probably gone. When you went out together today, were you in a group of friends or by yourselves? To be honest it sounds like she's definitely over you, and happy with her new boyfriend...sorry to be so bluntly honest. But - you broke up for a reason, right? Even if you're still not over her it might still be for the best. And about the whole being cuddly, and out-of-character-ish, maybe she's just changed a lot in the past year since you last saw her? People can become more / less affectionate around friends.
Hope that helps a bit.