Would it offend you if your friend said this to you?

whos your best friend? if you was out with him/her like in a mall or at a park or anywhere lol and they did something stupid or said something crazy and u asked them why did you do that? and they go dunno im bored or if u was at their house and after half n hour you was there they sighed saying bored would that insult you in anyway and yes its happened to me bout 5 times when they said that i was like oh :(:( i hardly see friends anyway but the last friend i was out with which was a few months ago said that she was the b word which did insult me my mum felt sympathy for me though i did think that it was their fault because if their going to invite me over to their house they should think and plan stuff for us to do so that we arent bored am i right or wrong? why did it make me feel bad about myself when they said to me that their the b word?