My boyfriend only sends me blessing messages.

I think it's normal and it's necessary to send blessings on holidays. At least in my opinion, he still regards you as a friend, whether intimate or not. For me, even if I have some contact information, I won't send blessings to them at any festival, which may be due to my personality disagreement or other reasons. Of course, reciprocity is also important. I mean "reply". Of course, there may be other possibilities, but that's all I can think of .