Whilst your son may be in a coercive relationship it's not easy to get out of these situations and I'm afraid he won't admit this to you (if true) - and, sadly, it will not be you he turns to for help.
I hope he has some dear friends and/or work friends who will "hang in there" with him as much as they can. Or maybe there is someone from his earlier life he can turn to if he needs to in the future?
Now the hard part - you have pushed him away with your smothering behaviour and negative attitude towards the person he loves/loved most. Whilst you did pay for his travel to see her I'm sure you have been too invested in him and his life so that you have most likely been the agent of your own misfortune.
I don't think there is anything you can say or do now as the damage is done. The best is to focus on the positive relationships in your family and nurture and enjoy those.
If I was you I'd do what others have said and write a journal rather than text messages to nowhere.
I would try counselling again - and try to go with a more open mind this time. Counselling is about you and I think I'd want to focus on how I might feel better in future and overcome the pain. Choose the practice carefully as you are not going to necessarily find the right person straight off.
I do feel sorry for you - but only you can find a way forward.
Let your son go. You have told him repeatedly that you are there for him so now you must stop this and get on with your life. 
Why do restaurants and takeaways close so early now?
By special request, let’s discuss our favourite Classic Music and why?


