Does my male co worker like me?

I'm a female and I have been working with a guy for a few months now. I've been out of the dating scene for over 10 years and I'm very freshly single so I'm not used at all to any kind of flirtatious body language so I have no idea if this is the case. - Tells me really bad jokes - Checks in on me to see if I'm ok - Has poked/tickled my side on a couple of occasions - Puts his hand on my back to guide me when we're walking - I initiate a lot of texts and get minimal back - Stays in eye contact when I'm making eye contact with him - Calls me a weird nickname - Sometimes sticks the middle finger up at me jokingly I understand it's difficult now for guys in the work place to not cross boundaries and seem too much. Any thoughts would be helpful 😁