If u dont hold out u could regret it for the rest of ur life i think in your emails u should be more suggestive of how u feel. Maybe a break would be good. Its not impossible because obviously you both love each other. Let your soul be your pilot. Ok bye youve probably had loads of replys by now anyway.
Any lasting relationship is built on a foundation of mutual trust.
Once you betray that trust its very hard to regain it. I'm sure you can convince her of your true feelings. I know for some people its very hard to admit true feelings especially if they make you vulnerable to rejection. If you're serious about winning her back though you will need to smother her with love and affection for a while at least.