I know I shouldn't have done this, but about half a year ago, my girlfriend left her email open on her laptop and I read the first few recent messages on her inbox. I simply couldn't resist the urge to. In one of those messages, dated a few days back, she had sent her ex boyfriend a simple and short message that read 'i love you'. I felt bad about it but I repressed and forgot about it and never brought it up, until yesterday.
So we were having pillow talk last night, and the topic of cheating came up. I asked her what her definition of cheating was, and she asked me what mine was. I told her that cheating, to me, wasn't limited to just sex. Flirting and exchanging naughty words with someone you're attracted to (but cannot be with) is like cheating to me, as well as telling someone that you love them. So she got all awkward and admitted that she has indeed said 'i love you' to her ex before, but insisted that she only did it once when he was in the hospital for heart problems about two years ago. I asked her about the email that I had read, and she then admitted that she just lied to me and that she actually did say it quite often. She wasn't mad or upset when she confessed though, but she did get upset later when she told me that I was a jealous freak to be looking at her stuff and that I invaded her privacy and well, now she's pissed off at me.
Is it wrong to tell an ex boyfriend that you love them? I'm not worried nor do I feel threatened by him because he's a really nice guy and I'm 100% confident that he will never make a move on her. I just feel weird that we're about to get married and she still has feelings for her ex. If she wanted to go back to him I'd be okay with that because I know I'm not as good as him and I only want her to be happy, but she insists that I'm the one that she wants to be with and that she'll never leave me for anybody else.
I believe her when she says that she will never leave me or cheat on me, so that's not at all what I'm worried about. I just feel bad that I'm not the only person that she loves. I just dont' know what to do.