Ok, so I periodically have cold air blowing on me(even when I have my heater on full blast), so I assume there is still air in the cooling system. I have also checked the coolant reservoir cap and it has blown off at least twice during long drives. The first time, I just thought I didn't put the cap on tight enough, so I made sure I did that. I checked it again a couple drives later and to my surprise, the cap is off again. The temp needle does not go over halfway... at least not yet. Although when I had it idling for good 45-50 minutes, the needle seemed to move slightly pass the halfway mark. I got scared and turned the car off. Also, it seems like I have cold air when I'm idling, but when I start driving or revving, the air turns warm again(sometimes).