<human>: Can you give me the gist of the text in a nutshell?

We were together 4 years, even thinking to tie the knot eventually, but things fell apart this year and she left almost a month ago. Now its over and its been more or less a clean break, except for the fact that I'll probably see her at least once more as she still has some things to collect from my home. Anyway I've been trying to be strong and go my own way, but today is her birthday. Maybe I'm a sap but I thought to text her happy birthday. I'm not sure if that's a good idea though. I mean, I loved her and cared about her for so long it feels weird to not even acknowledge her birthday at all. But then again, I'm not sure why I feel compelled to do so and part of me isn't sure it is a good idea. It seems like a possible nice gesture but I don't know what I'd stand to gain as I'm sure we aren't going to pursue a future together.
<bot>: We broke up and she moved out a month back, today's her birthday - send a birthday wish or try to ignore it?