What I meant by normal is that living our lives as though they are measured in teaspoons and trying to endgame everything is exhausting and frustrating and gets us nowhere. She contacted you. That is something. Maybe it was just concern for someone in the past (I've sent similar things to distant folks). Maybe it was her realzing for the first time in a while that she has some flicker of a feeling. Who knows. You probably never will.
I would just treat this text as you would a next door neighbor. If you would normally respond to a text of this nature do so. Forget that it is from her. Do it for your own sense of sanity. Then let it go. Move on. GAL. Be happy. Then you don't have to worry about whether she is offended or delighted or anything else. Just act in a "normal" fashion. Be the person you normally are. And leave the game playing up to her.
Ultimately you have to decide whether your heart is open to her or not. If it isn't, move on and don't care and don't respond. If it is or you aren't sure, be civil because not responding isn't going to move anything anywere. Just don't put your hopes into a response because you will be setting yourself up for disappointment.
