Does he like me or am I delusional?

So i (Female) just started a new job 2 months ago and i don't know if this guy likes me or not we both started this job together along with other people.

So last week i was at lunch with him and we had good banter we even added each other on social media he did bring up that he had a gf but from what it sounded like they had two different perspectives on life and the future (they have been dating less than a year). However his and mines aligned a lot and we agreed on a lot this topics regarding our futures. We had some light bullying and glances at each other but nothing out of the ordinary but when i told my friend the full situation she said it was flirting.After this conversation I think i do like him and haven't stopped thinking about him for the past week but I respect his relationship and don't mind being just friends.

I've now spoken to him again on and off throughout the week in person and via work messages. I go to the gym early mornings and he said he was interested in going too, he messaged me at night asking about it and we planned to go next week.

is it weird for him to be going to the gym with another female when he has a gf? Should i question if his gf is aware of this when we go to the gym?

or is he just being friendly?

he sounds interasted but i cant be sure but definatly question if his gf knows that you guys are going to the gym together casually because in the end if he is just being friendly you want to be respectful of his relationship even if he doesnt think its going anywhere and if it does turn out that he likes u then im sure you'll figure that out on youre own i do think its slightly weird you guys are going together but honestly you do you.

But today he took 8 hours to reply to my message?

So last week i was at lunch with him and we had good banter we even added each other on social media he did bring up that he had a gf but from what it sounded like they had two different perspectives on life and the future (they have been dating less than a year). However his and mines aligned a lot and we agreed on a lot this topics regarding our futures.