my SO hasnt said "I love you" is it bad?

we been together for awhile and I slipped up 2 times saying I love you and he never said it back. Now that am pregnant he never said it once he only says I really like you and not use the word love. I am confused and just realized this has been going on.. advice?

update: yes he showers me with love we hangout together alot. We are passionate towards one another he just hasn't said it yet.