<human>: So basically she cheated on me last week and has been flirting with the guy for awhile without me knowing. I feel so stupid for being so trusting. Now we're split and she's living with him all of a sudden and it really hurts. The last couple days have been some of the worst of my life. I can't sleep without nyquil or something similar, and to add on top of it all, I've been sick with a bad cough for about 2 weeks now. I had to change my number because she kept calling me and completely torturing me in front of the guy, saying just the worst things in the world to me for his benefit, then a couple hours later she would text me and say how she missed me so much. I can't close my eyes without picturing her physically with the other guy. It has been pure hell.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Girlfriend lived with me for 5 years, cheated on me, now lives with the guy and I just feel so alone.