Some dude called my cell phone looking for my fiance

[Snarf]

ok - I could be 100% wrong in this post - but I gotta bring it up

We're all assuming she's cheated on you.
(looks likely, sorry man)

However, its still possible that she hasn't done all that much wrong here.

Her shenanigans/odd behavior could be explained by the fact you reacted like you did - and - in all honesty here - we can only assume this is not the first time you have reacted similarly. Even if she has a legit explanation, or more likely an explanation for a slightly shady situation that might not be as bad as it seems, she could possibly act like this just out of fear of how you would react.

I'm not really blaming you for all of your behavior...I've been through some [censored] this last year and have learned what I am truly cpable of and surprised myself with my crappy reactions to things over..and over...and over...again...

Anyways - just tossing that out there, its something to consider.