I don't know if Myself is genuine or a troll, but let's assume that she is genuine...
A lot of Polish men are actually pretty shy and not that... assertive about pursuing relationships*.
*this is especially true among the more educated
That's kind of my observation too, I guess...
Myself, if he asked you out (only you and him) on several occasions, pays for you (friends pay for themselves, split expenses during meet-ups or one time one person pays and another time another person pays), you were holding hands and he kissed you... If he kissed you on the lips and not on the cheek then I don't understand what's so cryptic about his behaviour. He's clearly interested in you romantically. But he's probably shy and I'm guessing a sweet guy too. He won't drag you to bed on a first or "even" a third date lol That's nothing unusual in Poland in my opinion.
Usually, the guy I am used to are very adamant about lettin me know they like me.
That's probably often not the case with Polish people (not only men, but women also). They may be more likely to give you indirect signs that they like you rather then go like: "OMG, I like you so much, let's date!" ;)
Yes, Polish men can be confusing, for Polish women also, trust me... :)
Since you both are shy you may be going in circles like that forever or until he decides that you're not interested and you prefer to be friends with him or sth.
If you don't have the courage to tell him that you like him and that you're interested in him romantically then my advice would be to do it "the Polish way" and give him some less direct signs:
If he's always taking you somewhere then take the initiative and ask him out yourself, like to the cinema for a film or to the theater or wherever you guys like going. Or where he likes going. If you don't know where he likes going or what he likes to do in his spare time then ask him.
Use some body language - find some opportunities to touch him, like holding hands or... um... I don't know the name for this gesture in English but I have also this in mind:
Take his arm like this when you're walking. If you're too shy for this and it would be too akward for you to do it "just like that" then think of some kind of excuse, like, for example, that you're cold and it's warmer next to him or whatever ;)
Btw, a grown man and a grown woman holding hands is a couples' thing in Poland usually (unless the male friend is gay, I guess).
Touch his arm when you're laughing/joking around, take some invisible speck of dirt from his coat/shirt, etc. - you know the drill ;)
Since he was on a family wedding not long ago you can ask him about it and about his family and generally simply show interest in him.
Later on you can invite him to your place (if you haven't yet) to watch a film on DVD or for a dinner after work. If he cooks you could cook some meal together - it can be fun and a nice bonding experience. You can say, for example, that you'd like to show him how some dish from your home country is made or sth of this kind.
At some point ask him what he likes in women to give him a clue :) and maybe that could lead to a conversation about a realtionship...
In other words, gradually give him more and more clues that you're interested romantically and he'll become more sure of himself and will stop fearing rejection.
How old are you guys? And where are you from (from which country), Myself? If the culture of your country is a lot different than Polish then he may also not be entirely sure how to approach you.