Most Helpful Guy
Yes it's okay to care, but don't expect them to care that you care or to acknowledge your caring. You have to be realistic and it's realistic to expect that they might not want any further contact with you. If they do and you can be friends then great. It's all about accepting that it's over. Once you've truly done that then you can be grown up about it.
Most Helpful Girl
Yes it is okay. You respect him and there is nothing wrong with that