<human>: Can you condense the text into three sentences or less?

I'll try to keep this short...my current girlfriend, let's call her Bridgett, and I have been together for a little over 10 months. Several months prior to dating her, I was cheated on by my ex by the same guy TWICE, once in the beginning stages of our relationship and again at the tail end. Yeah, I know "once a cheater always a cheater" blah blah....I get it lesson learned. 

On to the current situation...my girlfriend's friend, let's name her Sarah, is having her 23rd birthday next weekend, and both she and I (pretty sure I was invited bc im Bridgett's boyfriend since I've only met her a couple times and this was a small party -- but I digress) were invited. Coincidentally enough, Sarah is also close friends with the guy my ex cheated on me with, and I'm sure he will definitely be present for the birthday festivities. 

Naturally enough, I'm not totally thrilled about going to this party due to what transpired between this guy and my ex several months prior to dating my current girlfriend. I told Bridgett, albeit reluctantly, that I would go so she wouldn't have to go alone, but I also expressed that I was ambivalent about going due to the reason stated above. She goes on to question my love for her, whether or not i'm over my ex, stating that if I was truly over her, I would have no problems at all with going to this party. She also added that if I loved her, I have no problems with this guy, saying, and I quote, "you can't blame him, if any guy was in a situation where a girl is hitting on him, he would go for it no questions asked, regardless of her relationship status"

Needless to say, I was somewhat taken aback by both her blanket statement about guys in general as well as her not understanding why I am totally not thrilled about this party. I want to hear your thoughts not on who's right or wrong per se, but just to get a third-person perspective on the whole situation. Thanks!
<bot>: girlfriend's friend is having a party. Guy my ex cheated on me will be there. Girlfriend thinks if I truly love her, I would have no problems going