Have you ever heard of the Five Love Languages?
Check out the book here: link
Basically people need different types of expression to feel loved. Some need gifts, some need to be touched, and so on. Yours sounds like it's "Words of Affirmation." You might want to read that book and then see if you can get your boyfriend to read it. Maybe then he'll understand you have different languages and you need him to speak yours. And also you can figure out what his is. You may be assuming that since yours is Words of Affirmation his is too. But maybe his is something else and if you can both learn what the other needs you can make each other feel more loved.
If he is completely dismissive and won't even talk about it, that's a really bad sign of his lack of empathy for you.