Wife no longer in love with me

[cam]

So my wife got back from America on Tuesday and just texted me this morning to say:
"hi, hope you've been well. Just wanted to let you know I'm back in town. Hope you have a great birthday this weekend"
Not sure what to make of this or whether I repond or not. I confused as to why she would even contact me to tell me that given everything she has done.
Any thoughts??