Am I obligated to take a pawn?


I play chess at work and a coworker says I cheat because I don't take a pawn and instead I move forward completely ignoring to take. I know I'm in the right but he doesn't believe it can be done, other coworkers also say I'm obligated to take and I don't know if they're mistaken by something else.
Unless you are playing a chess variant, which is entirely different game, you do not have to take anything the opponent offers. I think the name of the variant is anti chess in English (in my language it is a called differently and it virtually translates to "Eat Eat", so basically the name tells you that you have to take).
A bit off topic, apology for that, but in any case, you do not have to take the pawn (unless it is the only legal move on the board).
I play chess at work and a coworker says I cheat because I don't take a pawn and instead I move forward completely ignoring to take. I know I'm in the right but he doesn't believe it can be done, other coworkers also say I'm obligated to take and I don't know if they're mistaken by something else.