I need help! 😬

My boyfriend and I have been together a year now, and I love him so much. But when we are together it seems like we don’t have any fun together, and I know that I don’t want to marry him but I still love him because we have spent all this time together and he still treats me really well. The question is, do I end things even though he is good to me, but I know I don’t want a future with him? Or do I just stay with him until something better comes along? But i would still be sad if we broke up. I don’t know what to do :/