Hi Northerner,
I understand why Rizza is hurt when you told her no lovey dovey stuff in FB. For her, you are a couple, regardless of being in LDR. I am also certain that she is very proud of you but might feel that the feeling isn't mutual. It is frustrating on her part when she can't make "lambing" to you. To us girls, it is so "kilig" to make "lambing" in public.
I too felt hurt at some point when my boyfriend decided to be listed in a complicated relationship in there. He just said he's not ready to list as a couple yet and that he has always thought of our relationship complicated. He asked me to wait until he is ready but we do normal lovey dovey stuffy in there and he even posted pics of us together.
In my opinion, it is ok to take time in making your relationship public but you should also be mindful of Rizza's feelings. Don't expect that once you explain to her the situation, everything will be ok. At some point, she may again feel frustrated about the situation. Always be there to comfort her and let her know how much she means to you.
Take care.xxx