Lacuna - the missing part

ᴄʜᴀᴘᴛᴇʀ ᴏɴᴇ

ғʟᴏʀᴇɴᴄᴇ:
"BORING" I heard Avery yelling behind me. "Shut up, here are people." I almost whispered. "I don't care. Well, it is your fault that I went here." She suddenly appeared next to me and boxes my shoulder. "I didn't know it was an art exhibition today." I said, rolling my eyes. "I payed 8,43 pounds for an art exhibition. You promised me that this museum will help me to understand our history cours." Her voice sounded angry, but I knew that this was just acting. "Like I said I'm sorry, but at least the art was good." After finishing my sentence I noticed that Avery wasn't longer next to me. I turned around and saw her standing a meter away, staring at something behind me.

"Oh come on, don't act like it was bad." I joked, but she didn't replied to that. "Someone tries to steal your bike." She answered instead. I turned back and saw a boy trying to open bike lock. "I'll fix that." Avery said and walked straight forward to the boy.
"Hi, can I help you?" She asked. The boy looked up. "Yes I can't open my bike lock. Do you have anything I can open it with ?" He asked and I almost started laughing. "Yes, I have the keys." Avery said and I couldn't stop it anymore. A smile was definitely seen on my face. But the boy didn't seemed to notice because he asked if Avery could give him the keys. A moment after he stared to realise what that meant and then he looked first at me and then back to Avery. "Shit." He mumbled. "I'm sorry." "Oh it's not mine, it's hers." Avery took a step to the right and his full view was me. "I'm sorry" he repeated.
"Don't worry." was all what I could think of.  don't worry. Really? He tried to steal my bile and I said it's okay? I definitely need to sleep.
"Well, I owe you something. Goodbye then." He left very embarrassed.
Avery looked at like I just tried to steal a bike. "You should have asked him for his phone number." She said. "Why? To give it to the police? He didn't really stole my bike, so it doesn't matter." I took the keys out of my purse and opened my bike lock.
"But he was cuteeee" said Avery.
"Then why didn't you ask him?" I answered ironically.  She made a disappointed face.
"You're stupid." "See you tomorrow." I replied while I already sat on my bike, starting to drive. "Yeah yeah" I heard her saying.

I drove along the river, as I heard a weird noise from the left. I turned in that direction and saw someone trying to open a bike lock. It was the same boy who tried to steal my bike some minutes ago. I immediately wanted to continue my way home, cause I was all alone now. But it was to late, he already saw me...