[Ellen]

Sorry but your bf is an inconsiderate arsehole! It is irrelevant that you had not contributed, he knows the score as to your financial state and he made arrangements with you and friends to go away for the weekend.
He makes other arrangements at the last minute, doesnt tell you and somehow thinks it doesnt matter and your in the wrong for getting upset?! He is a t wat and a crap bf imo.
You are not a bitch at all, in fact i think he is very lucky he still has a gf at all if thats his attitude!