I feel like I'm in love, but no one comes to mind?

I'm 20 years old, and haven't had serious romantic feelings for anyone in many years. But lately, I've been getting the feeling like I'm in love. Butterflies in my stomach, a longing for "someone?!", and unable to get to work because this feeling is so consuming? :horror: It's happened a few months ago too, but I didn't bother asking anywhere about it. It just seemed to disappear in a few days then, but now it's back.

And no, I don't mean turned on... I know what THAT feels like, and this isn't it... LOL

No one specific comes to mind.
Do I just not know who it is? But really, that sounds ridiculous LOL.

Anyone felt this way before? Any pointers on what to do?