Hi, I'd like to help you with your questions.
Your boyfriend probably has the wrong idea about you. You had a bad weekend and you were dealing with the death of your uncle. You needed were down and wanted to connect to someone and thought of him. You may have overreacted some, but you later apologized. That should have ended it.
But what might have happened is your boyfriend became scared when he noticed that you seemed needy so he backed off. Now he is afraid of trying to connect to you again because he may be unsure of how to handle someone who needs him.
Sometimes people react in relationships with what they learned at home growing up. If your boyfriend witnessed his mother being needy and his father backing off, then he may react in the same way to you. It is helpful to know this because his reaction may have nothing to do with how you are acting and more to do with his fears about relationships and people that need him.
He may also be fearful he cannot address your needs. Some people are at a loss when someone needs them. Men in particular feel the need to have answers when emotions come up. Your needs may upset your boyfriend because he does not know how to "answer" them.
The best option is to back off more. If you usually text or call him every three to four days, give it a week. Then send him a very short text such as "Just wanted to say Hi". Then let it go. If he doesn't respond, give him a little longer. Once he notices you backing off, he may start to feel better about coming around.
Give this a month or two. He needs time to adjust and realize that you want a normal relationship with him. He will probably contact you again after he sees that everything is ok.
I hope this has helped you. Let me know if you have further questions or want clarification,
His telling you to "be a blessing and not crazy" is just a way of expressing his fear about what happened between you. This is his view and may be based on his own experiences or something you did. It is hard to tell without knowing him directly.
It sounds like the relationship is developing between you but that he may have issues he is bringing into it. His reaction to your needing him is one of them. That is why it is a good idea to back off and see what he does.
He may also be waiting until you are completely separated from your ex. Some men feel hesitant to start a relationship with someone until they are free of other relationships.
But most of what I said before seems to still apply, even with the new information. I would still give it some time and allow him to make some choices about contact. That way, he shows he wants to be with you.