Struggling to Make Polish Friends After 3 Years Here. Any Advice?

I’ve been living in Poland for about 3 years now, and beyond my work colleagues, I haven’t really formed any close Polish friendships. I’m wondering if something about my behavior might be off, or if it’s just a cultural thing I’m not picking up on.

For example, I sometimes invite people over to my place to hang out, but they often seem puzzled by the invitation—like they don’t understand why I’m doing it. The same goes for suggesting spontaneous outings; there’s a sense of hesitation or disinterest. At work, everyone is super nice and friendly, but it never seems to translate into closer, outside-of-work friendships.

Is this normal? Do Polish people generally take more time before they feel comfortable getting close, or do you think maybe they’re just not that interested in being friends with me? Any insights or advice would be greatly appreciated.

Update: Thanks for all the advice. I want to add that I am not continuing to invite people after seeing they are not interested ofc I understand that would be absolutely weird. About inviting to house, I see that might be too much for some people. I will try to make friends though other places.