<human>: Can you provide a brief rundown of the text in within 3 sentences?

My gf just finished Uni.. got to her home town and after partying last night invited her ex back to hers. She said nothing happened and that she only did it because 'his friends left him, and he was drunk/wasted'... Even if nothing happened (pffffft) is that still alright? Her ex and her happen to have that relationship where they have split up more times that you can count but after years and years end up back together. Another thing that makes me think this is bulshit is that, this exact same scenorio has happened before.. admittedly we were only texting at that time.. but again same situation and same outcome... makes me think she wanted him to come back.

I dno, Im new to all this relationship stuff... maybe Im being a cunt, maybe im paranoid... Like she told me he came round, you'd think that would be proof she has nothing to hide.. but forgetting that im pissed off about that... I cant help feel she is only telling me part of the truth... Everyone knows its easier to lie to someone when you tell a bit of the truth..
<bot>: gf invited ex back to hers after night out, claimed nothing happened and she only did it because his friends left him and he was a mess. Same thing has happened before (with same excuses)..