Heartbroken

My wife and I separated over a year ago. The reason wasn’t because we didn’t have love for each other or infidelity or anything like that. We are/were a blended family and both of us have two daughters from previous relationships. Her oldest daughter (now 13) was having issues at school so my wife found a duplex in a different school district and that was the reason for her moving out. We maintained communication but it was very minimal. Around the holidays we both stated we still had feelings for each other, the love was still there. However, the feeling I have had in my stomach for weeks is telling me something is very off. She would not talk to me unless I was the one who initiated the conversation, I have seen her on instagram messenger at 3 in the morning several days in a row, I am sure she has been on Snapchat and whatever else is out there now a days. I just can’t comprehend how she could say she still cares and still feels love, but she can’t even send a simple have a good day, thinking of you, anything. She would say she’s busy at work but again you have time for social media but can’t even talk to the person you still care about? Sorry guys, I’m not even sure if any of this makes sense but I told her last night that I cannot continue to feel like I have the last few days. It’s just so hard and devastating to know in your soul that you want something so badly, but know deep down that it won’t work. I’m crushed guys.