I totally agree about the woman’s happiness is what matters and I’ve always said this to her. I’ve always loved her and known she loves me, worships me Infact, but im always asking her if she’s happy and she says yes. Because all I want is for her to be happy
I think if you're really honest with yourself (and us) you knew she "worshipped" you and so you never thought she would be the one to end it.
You ended it then I assume the reason you wanted to "quiz" her about her seeing other people was because she had managed to emotionally distance herself from you and become more self confident after you broke up with her.
So when you decided you wanted her back, you were floored that she didn't go back to worshipping you and jump into your arms.
It's just too little, too late.
Sometimes love isn't enough.
If you love her let her go and learn from this that making everything about you and wanting everything on your terms doesn't work out in the end.
You say "all I want is for her to be happy" but this seems to be a revelation you've had since 2/3 months ago (when you found out she was moving on). Why would she (or anyone) be able to believe your words of 2/3 months versus your actions of 14 years?
Stop being selfish and let her go. If she wanted to get back together she would, she's trying to be kind and probably feels bad because you're making out you won't be able to cope without her etc.
Stop all that. She knows how you feel. Telling her over and over is unnecessary pressure and it's unfair. She knows. She just doesn't feel the same.