d-res-----"....I dont know what to do. so tell me what you think. should i stay with her, .......give her another shot or should i leave her because she did something that can never..."

I don't think age is the issue. Humans pretty much feel the same. Hurt is hurt, regardless of age. The best advise I can think of is:
*Don't make any decisions now
*Cool off. Calm down. You need space. Distance from her. To think things through.
*You can't think when you're angry and you might say or do something you'll regret later.
*Give it 2 weeks. Than make a decision from there.