What's going on? Does my coworker like me or not?

Anonymous
Signs he might like me:

He stares at me all the time

He parks next to me wherever I park

He makes small talk sometimes

He teases me

He stares at me while he's talking to other coworkers (everyone in his area stares at me too (might this mean he's been talking about me?)

He helps me with my work, filling in for me on my break or giving me advice

He laughs at stupid stuff I say that isn't even funny

He usually makes sure he's around when I'm leaving or he gets to say bye to me if he's leaving

He lingers around me during work

But...

Signs he doesn't:

He ignores me a lot

When I smile at him sometimes he doesn't smile back

He avoids me sometimes

Extra facts:

It upsets me when he ignores me, so I've tried ignoring him too, or acting indifferent, like one time he was hanging with a female coworker and said hi to me in an annoying voice and I just ignored it while going up the escalator...or I won't acknowledge he's there in our morning meetings, and he won't acknowledge I'm there either

He's gone on a few dates with another coworker but it never became anything and they're still friends, they talk to each other sometimes, so I avoid them and try not to be around when she comes up to us

Why is he so bipolar lol? Should I be ignoring him or should I just keep smiling and being nice? I don't want to seem too obvious.
What's going on? Does my coworker like me or not?
3 Opinion