Hello!

While talking to my girlfriend tonight about masturbating and such, the topic of people fantasizing about others came up. She strongly believes that thinking about someone, other than your SO, while masturbating is cheating.
 I told her that that happens to me sometimes when I masturbate and she broke down in tears. It absolutely broke my heart as she's the only girl I've ever wanted. She doesn't seem to understand that she's the only girl I want to have sex with. I have never been tempted to do anything with anyone else. I don't want anyone else; I want her. I have never thought about cheating on her or doing anything to betray her trust! I could never do that to her. She's literally the only girl on my mind. 
Is there any way I can make her see that? I feel like things have been ruined now and I'm afraid that she sees me as someone I'm not. I'm crazy about her and what happens when I masturbate means nothing in my opinion. I really don't think I'm a cheater.

We've been together for a little over a year and a half.

Does anyone have any ideas as to how I can fix things? Thanks a lot!
user
My girlfriend thinks that me fantasizing about
assistant
Hello!

While talking to my girlfriend tonight about masturbating and such, the topic of people fantasizing about others came up. She strongly believes that thinking about someone, other than your SO, while masturbating is cheating.
 I told her that that happens to me sometimes when I masturbate and she broke down in tears. It absolutely broke my heart as she's the only girl I've ever wanted. She doesn't seem to understand that she's the only girl I want to have sex with. I have never been tempted to do anything with anyone else. I don't want anyone else; I want her. I have never thought about cheating on her or doing anything to betray her trust! I could never do that to her. She's literally the only girl on my mind. 
Is there any way I can make her see that? I feel like things have been ruined now and I'm afraid that she sees me as someone I'm not. I'm crazy about her and what happens when I masturbate means nothing in my opinion. I really don't think I'm a cheater.

We've been together for a little over a year and a half.

Does anyone have any ideas as to how I can fix things? Thanks a lot!
user
GF thinks I'm a cheater and I'm
assistant