Is he being flirty? Is he attracted to me?

He stares in my eyes for a decent amount of time, he stands close to me at times, I can sense him checking me out, he writes "have a good day" notes at work with a smiley face, he put a small heart next to my name on a piece of paper, I told him I was going to dinner by myself out where he lives and he joined me on his own free will and after that he hugged me very tightly. He also mentioned going out again for dinner.

Is he being flirty? Is he attracted to me?
Post Opinion