I feel your fear, its a terrifying place to find yourself in. Insecurities can eat away until a powerlessness holds you chained. The awful knwing guilt!
Only you can make the decision but I urge you to live the life that your heart and your happiness deserves.
I have learnt to combat the guilt by reminding myself of the love I feel for my family which is seperate from their indoctrinations. It isn't easy but living a lie is the most terrible one can do to their spirit.....it positively kills.
There are so many amazing things out there just waiting for you. You have already had a wonderful experience with your girlfriend and I promise there's more.
When I left the JW's (I wasn't baptized just brought up in it) I hit the road. Even those many miles away in Asia or South America I was grappled with the hurt but I saw the world beyond too and it was one of so many possibilities. Happiness is possib;le but you must follow your own path.
You can not hold the guilt for everyone else, yes you do deserve to live your own life, your own way
Good Luck!!!!!!