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

Long story short. My ex and I finally broke up after a month of constant arguing with the main reason of me snooping on her Facebook without her consent for 2 mins according to the history. The reason I felt like snooping through her messages was because she was constantly talking to another guy I had never met before, and also never allowing me to go when they hungout. We constantly had problems before with other guys but I felt the worst about him. She always reassured me he was a friend but seeing them in pictures on his facebook made me cross the line. So I ended up going on her facebook and lying about doing it, then getting caught. She later tells me on a scale from 1 to 10 (10 being the worst) that it was an 11. Is she overacting or what I did was fucked up to the point of breaking up permanently? Please give me your advice! We dated for nearly 3 months.
<bot>: How bad was it that I snooped on my ex's Facebook messages for 2 mins without her consent? Am I a horrible person for breaching her privacy?