I can't trust her, am I right?

My fiancée and I have been having some problems and that's another story. But this is something that is a deal breaker. My fiancée has this friend that always texted and called her when we started dating. I told her it was odd… Especially when I saw a text that said "can't stop thinking about you." I called her out on it and she said he is just like that and to even ask her dad who knows him, that he just talks like that. That was months ago and I'm passed it. Anyways, after him calling every now and then she blocked him for me on her iphone so he can't call or text. Well, I noticed he was unblocked. What the? I can tell you now, she isn't seeing him she is with me all the time. But communicating with him? Maybe she works away from me and I don't know what she does on her downtime at work. So if she isn't sleeping with the dude or whatever, why did she go out of her way to unblock this guy who is clearly obsessed with her? Lack of respect to me, and frankly it's a deal breaker where I can't confidently trust her. What do you think?

Definitely shifty. Don't marry her until this is sorted out. Confront her.

Ask her about it. If she gets all emotional, then she has slept with him. If she gets annoyed she doesn't love you. And if she claims that you are lying. Don't marry her. Sort things out. But if she does any of the above, she is lying and you shouldn't marry her. Sorry. Hope this