Back to "Should I"?
Andres's story is a good lesson to hear. I've been with a couple of 'crazies', and the biggest downside is that you're never allowed to be the crazy one. Everybody has to go a little nuts once in awhile; be irrational, emotional, temporarily childish. When you're with a crazy you never get that time, they get all the crazy attention, and you get to be "the rock". Over time you really do become the rock - humorless, all-business, hard - and eventually that "love" you had, when mixed with simmering resentment at being held back from life, turns into disgust and hatred. Or worse: apathy.
My recommendation: don't do that to yourself. Deep down, you already know what you truly want, or you wouldn't waste time asking "Should I"? I submit that your feelings for the ex spring more from your sense of duty, than from actual appeal. Hence the need for you two to take longs walks down Memory Lane to find feelings of happiness, cuz you're not happy now.
High marks for persistence and a highly-developed sense of duty. But I gotta give you an "F" if you entertain and keep the notion that you have any actual obligation to ex.
Wait... that's too harsh. Discover, then admit (to yourself) what you really want to do. Then do it. We'll all back you, whichever way you go.
Good luck.
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