<human>: My girlfriend ended things with me due to her losing her feelings and as amicable as possible almost two months ago and we haven't had much contact since.  

On the weekend I was out drinking with friends, and ended making out with a girl for most of the night. Sunday was spent nursing my hangover, but today I've woken up and I have a deep burning sensation of guilt?

My ex girlfriend still has a lot of her possessions at my (was our) house, so maybe it that's why. 

I'm not even sure why I feel guilty? Maybe It's because I still care about her, and it still feels 'wrong'? 

Reddit, slap some sense into me please.

Condense the text into a few key points
<bot>: Got dumped two months ago, miss her a lot, drunkenly made out with a girl and now I feel guilty.