I think that it is good to realise that you are not willing to accept having such a non fullfiling marriage FOREVER. That is good and you should not see this as being ok for the rest of your life.

You do not need to decide TODAY when you have had enough. For today set yourself some small goals FOR YOU.

Best wishes

R 25 years
M 14 years
S11 & S13
Working on it alone since Oct 2014
M in trouble a lot earlier (~2 years)
Feb 2016. 1st R chat in a yr.
Next R chat Aug'17
Still together