My heart goes out to you & I am not in the situation. I won't tell you i know how you feel. Because I am answering I care about you & offer you encouragement. I have had people leave my life & I was not well because of how i thought & obsessed about it. One thing you can do for yourself is reach out which you are doing. Reach out by seeking a good fit counsellor. You can't control what others do but you can control what you do. I know when it hurts it feels like you can't control anything. YOUR BUSINESS IS SUCCEEDING THUS HIRING SOME1 is agood idea to spend more time with ur kids.  

When i was sooo depressed i got counseeling it was short term as it was a practicum of a university program. I knew i had to find something else later to keep up the positive momentum of the help i rec'd. I had to change my way of thinking to stop being depressed. I READ THE BOOK SWITCH ON YOUR BRAIN by dr. Carolind Leaf a brain scientist & took the 21 day brain detox prog in the book. It changed my life because of the work i put into the prog & identifying my toxic thoughts & creating new positive healthy thoughts. Which i focus on 2 years later& keeps the depression away & helps facing challenges. I will send up a prayer for you now that you will find solutions & God will guide you through as you seek His help. Love & Best wishes EARL THOMAS "The VOICE"