It is a GREAT reaction from him IMO. He was there to greet you, he *wanted* you and had missed you in that way (absence makes the heart grow fonder). My advice is to not be too available, take heart from what happened but HAVE NO EXPECTATIONS. Don't be there when he gets back, if he wants to see you he will call. Respect the fact that he didn't want you to stay. Hold your head up high, ooze confidence and know that you just had a wonderful encounter. What you have been doing so far has been right, but remember he is still in confusion, you are not just going to fall back together. This will take time.
Let him come to you this weekend and if he doesn't don't lose heart, just go with the flow and let him take the lead.
Leave the joint sessions for the moment, leave all your issues as this will be pressurising. Read your post again and see what positive actions that happened in the first half and how you DBed to perfection and then read your negative/ anxious emotions in the second half. Put aside your worries and expectations for the weekend and go with the flow. Find some stuff to do in Dublin to occupy yourself with and if you're h contacts you great, but if he doesn't you will have had a fab time anyway.
(((((((ITH)))))))))
You're doing GREAT! Now get your a$$ back to Poland and let him realise what he is missing