Love / Why are polish men so damned complicated? [53]

Hi can anyone help me out here? I have been dating a polish guy since december. Everyday we speak and text, and even tell each other how much we love one another.

This morning all has changed!!! He text me last night to say he was having sex with a polish woman - just sex!! I freaked out and now he's says it's over. Am I being unreasonable, and is this acceptable relationship behaviour in poland? or have I just met a player?