Search Results: my ex keeps calling

My boyfriend and I broke up after a 2 year relationship that was amazing because I was leaving for university next year. He kept telling me we have no other choice and he is right. We decided to still be friends
2 weeks after the break up he came to meet me while I was with all of my girlfriends claiming to meet all of us which is BS. He was being so over friendly with them and weirdly normal. But he sort of was pushing me away and acting as if nothing happened.
I called him last week to tell him some news about my university application and in the middle of the conversation he had to make a call to his college coordinator for some work and apologised and said he would call back but never did.

He called 6 days later to invite me for lunch on his bday with 2 of my friends and 2 of his (who I have not met but know of). He apologised then for not calling back with a very lame excuse. Even when he came to meet me he was told me to be free on his birthday and I do want to go but its hard being around him because of how things are. But its his 18th birthday and I definitely dont wanna ditch him. I am probably going to go but, do you think I should go?

I feel like it's ridiculous for me to count my ex "relationship" as a relationship, since:
1- I never met the guy in real life.
2- We never called
3- We barely video-chatted (like barely twice).
4- It lasted for about 7 months only.
5- It was almost 100% sure it would lead to nothing ( very big distance, too many cultural differences).

I think it mostly depends on the people in it though , many people manage to keep it for more than a year, and are really into it and have legit plans to meet up and eventually move to the other's country (and they put a lot of effort in it to make it seem more real, like calling and video-chatting frequently).

If I ever think about getting into a new one, it has to be REALISTIC as in: Closing the distance within a year, regular phone calls etc... Which I might do with this new guy since we come from the same country (much easier to meet up during vacations when we're both home).

I think that if I ever mention it as a relationship to another guy he might find it funny, lame and ridiculous... I know that my friends do at least lol they say it's not even a relationship and I shouldn't mention it. I kinda agree with them but I want your opinion on it. :)