<human>: Can you succinctly summarize the text in 1-3 sentences?

So me and my ex girlfriend broke up a while ago. We dated for 2 months but i saw a gradual fall in my grades right after we started going out and I know its a shitty reason to call it off but I had to. 

Now its about 3 months later, we still pass each other in the corridors and in the common rooms but we have intimidate stares every time one of us enters the room. I kind of like it. The problem is that because im the one that broke it off, I dont know if its alright for me to start the conversation so casually. I want to start talking again but how do I just start a conversation? I notice her sitting on her own in classes and I have the urges to go up to her and socialize but i keep double doubting myself.

Dont get me wrong, I'm a very sociable guy. I love people and I love talking so when i dont have an opinion on a topic, thats very rare. Which is why I find this very weird.
<bot>: Broke up 3 months ago because of my dumbass and now I dont know how to be normal around her. I miss her but I honestly just want to start talking again.