<human>: Can you summarize the given text in a few sentences?

So basically we have only been dating a few months. I am currently at her house and we just had pretty great sex. 

About 5 minutes after the sex we were in bed and she was on Facebook chatting to a guy she has slept with before (a few years ago). This annoyed me a little but i shrugged it off and came onto reddit and started responding to peoples ask reddit posts. She then asked who i was talking to and I replied that i was just on reddit. She didn't believe me. I asked her what was wrong and if she wanted to talk about it before we went to bed. She said nothing was wrong but after me asking another 2 or 3 times she said dont stress its nothing but i don't want to talk about it. 

I am assuming she is mad because she thought I was lying about reddit. I even lay down on the bed in a way so she could see my phone. She is now asleep and i am in the lounge on the couch on Netflix. I hate not talking about things and leaving things unresolved.  I know that i could instantly fall asleep on the couch but if i went back to bed i would struggle to sleep since she is right there and i want to talk to her. But at the same time if i dont go back to bed she will probably be mad in the morning. 

So do i get a good night sleep on the couch or sacrifice an hour or more of sleep so i am there next to her in the morning? Also how do i handle these tiny petty moments in the future?
<bot>: girl i am dating is annoyed at me because she thinks I was lying about me being on reddit. (Thats what i assume) How do i handle these small petty fights in the future?