Boyfriend probs /: need advice!

So my boyfriend said that he didn't love me last night when he used to say it all of the time. And then he said "you're bad at being in a relationship" which I know for a fact is false, not to be cocky or anything, but I'm a great girlfriend. I don't want to break up, and neither does he, but what should I say today??? I don't want to come on too strong, but I need to stand up for myself but I'm bad at that not gonna lie /: