My daughters are grown now with children of their own. When I ask them what the issues are the only response I get is that I am difficult to get along with. Yet a few years ago one of them admitted to me that she has been treating me horribly for a number of years.
I raised them myself since their father and I divorced when they were 3 years old. At one point they were at their father's house with his wife and one of them called me and told me that I had lied. But I do not know what it was that I supposedly lied about. We were extremely close while I was raising them and during their twenties they are now 36 I do not know what to do and miss them very much. Their father passed away last year, it appears to me that there has been manipulation by their stepmother. I have seen many signs of this over the years.

Maybe its time you found your own happiness outside your daughters. I think they have gotten enough from you, and whatever demons follow them, leave them to overcome them on their own. Hopefully they realize how short life really is, and how stupid it is to waste it.

I think you should ask them to explain to you what exactly they mean when they say you are difficult to get along with and listen to them don't yell or argue or don't be defensive, just listen let them say what they have to, respond then with I am sorry even if you feel you done nothing wrong, you do want your daughters back don't you so sometimes you have to just let it go and say I'm sorry for what ever you feel I said or done to hurt you (open lines of communication). Forget about the past forget that one of them admitted that she has treated you horrible, that's done and over with, what happened, happened forget, forgive, and move on (forward) past is past if you will be stuck on the past then you will never resolve your issue and you won't get your daughters back so forget about it call them up and say you want to talk to them let them know you are sorry and you love them and want them back in your life and you're a mother and you made mistakes and you might make mistakes, and they should understand cause they are mothers now and you live and learn. Be patient time really heals all wounds so give it some time. Good Luck !

respond then with I am sorry even if you feel you done nothing wrong, you do want your daughters back don't you

Hmm sounds like you want the mum too eat S#@t and grovel.

Not in my eyes she doesn't have to.

Sashagirl if you want to speak to them and find out what's going on then do it. Don't let them play games with you or manipulate the situation.

As Tal said find your own happiness. They're still your daughters and always will be. If they let someone manipulate them then how is that your fault?