BF and I too different?

We don’t have much in common but we are compatible. He said he thinks we have personality conflicts.

I brought it up with him that I was having doubts about us and now I’m worried because I said that, now he’s starting to have doubts.

He said to let him know now so he’s not wasting time. That really hurts....like we’ve been together for almost a year and haven’t said I love you. Maybe we don’t love each other but deeply care for one another.

Is this relationship doomed?