Do you know the name of a movie from 2009?, max. 2007 where the guy is about to marry and has no friends?

He even goes out with gay men trying to make friends to go to the wedding with friends and even have a bestman. Ends up finding a great friend in a guy he met while trying to sell a house. The guy is a musician… they ride a scooter… I don’t remember the name or the actors but I had a lot of fun with that movie! Thanks