This could go on for a awhile so in the interest of saving time and writing some simple facts:
Married for >35 tears,5 kids, she won’t let me touch her, sex once in 2.5 years, have been to counselors, she considers us roommates, and seems to be an economical union. Top good quality: Me - Forgiving; Her - compassion. Top bad quality: Me - control; Her - control.
I made a vow for better or for worse, truly this is on the worse spectrum. Am I loving her more by seperating? I don’t know what else i can do within the marriage. So much history, so many failures.
First off, I’m really sorry that you’re going through this. Withholding affection and intimacy is one of the worst, most cruel things a spouse can do.

It is every bit as much a betrayal of the marriage vows as adultery is.
As to whether or not you should separate, my answer is ‘maybe’. You have children, are they still in the house? If not, then maybe a separation would be helpful. Your wife has unilaterally decided that you will no longer be living as a married couple. She’s happy to have you around because you meet her needs (social, financial, emotional, mental, whatever), but she doesn’t seem to concern herself with your sexual and emotional needs.
I am not saying that you need to walk out the door, file for divorce, drag her name through the mud, and sign up for
match.com. But maybe moving into a small apartment or an extended stay motel for awhile would be a good thing. Explain that she has decided to abandon the marriage, and that it it too painful for you to live in this constant rejection. Tell her that since she has decided that she no longer wants to be a wife, maybe it’s time for both of you to see what that would really mean.
After 35 years of marriage and 2.5 years of celibacy, you are unlikely to change her mind on this with talking, back rubs, promises, weekends away, etc. She needs to decide if she wants to be married to you. If so, then the marriage has to stop being a one-way street. If not, then she needs to admit that so that you can get on with your life. This might get her attention and force that decision. Of course, the risk is that she may not want to be married and she may be using sex to push you away. You have to be prepared to find out that’s the case.
Again, I’m sorry that this has happened to you, and I wish you all the best.
***In response to some of the other comments in this thread, I have to point out that the marriage vows are the foundation of a marriage. Those are the things that you are bound to in good times and bad. The advice to do more housework and buy her flowers is a nice thought, but A) I don’t think that strategy has ever worked to turn a frigid housewife on in the history of humanity; and B) Trying to use flowers and chocolate as the foundation that your marriage vows are built on is crazy! If his wife were cheating on him you wouldn’t suggest flowers to get her to end the affair! Why not? Because the cheating floozy wouldn’t deserve flowers, for one, and two, because you shouldn’t have to crawl to your spouse like that to get them to do the bare minimum.