NEW GUY?!

So my ex broke up with me but yet kept saying it was a break and that we were still together but not? We were together for five years and I’ve given him two months but yet while he’s happier I started getting more and more depressed but than I messaged him and asked if we were actually together and he said no we’re not so five days later a guy asked if he could get my number and I actually said yes which I never do!!! Who am I?! But we’ve been hanging out as JUST FRIENDS but he’s really nice and nothings happened and yet I still feel bad I don’t know why I’m a single woman? He left me I didn’t leave him but yet why do I still feel like I’m a horrible person?!