heyya there .... =)
don't be paranoid ...
my honest opinion,
you actually in some kind of wrong and by your post, i don't think that u've noticed whats wrong... is it true to say that? From your stories, what i get is this ...
1. You ask him to go and skate ... it's not him asking u, but u're the one asking him
2. Even though it's just a few hours later ... but still ... you don't know maybe what he has planned .... maybe he has cancel his other plan just to skate with you ...
3. You told him that u can't skate cuz u end up going out with other friends .... which can also be translated as: u're not as important as this friends i'm going out with tomorrow .... our skating session can wait since it's not important
I'm just assuming what he feels ... regardless how he SHOULD react ...
He feel dissapointed, He is sad cuz maybe he feels that he is not of any importance to you after being friends for 6-7 years, and maybe he feels that his plan for tomorrow is ruined ..... hu knows, that he agrees to go skate only because u asked him ....
I'm not sure why, but there is possibilities that the way you convey the message to him is too straight or direct ..... so that he perceive it wrongly? i dunno
i think u should apologize regardless of hu is guilty ... just apologize and tell him what u feel and want to convey actually ..... anyway, u've been friends for 6-7 years ... and hope that both of u will be healed and in the end be friends again ... and even with greater bonds ..
that's what i think ..... hope u'll be friends again ... =)