am I bad from being annoyed

Basically. Me and my boyfriend have been together a year in three weeks and all of a sudden over these past two weeks he's made a new 'best friend' I don't mind that. But now it's taking the p*ss ! He's spending all his time with this new best friend , constantly when I'm with him talking about what him and he's friend did or something to do with his friend. I tried to take my boyfriend to the fair ( my treat I paid for everything ) and when we got there he invited his little friend along ! He invites him round on our nights together at his and stuff I even asked my boyfriend to come see me the other day as I was alone and quite in a down mood and he said he couldn't because he's with his ' friend' . I can't do anything without him bringing his mate into it , it's getting annoying but does that make me a bad person for thinking that ? I love the fact my boyfriends got friends and stuff but this is like he's obsessed with him :/ !