Get a lap timer, put it somewhere you can only check when you are not on track, and FORGET about judging your lap times against other people's lap times. Your lap time is about your performance, nobody else's. Having a lap timer will allow you to see your progression, nobody else's. Turning a 1:37 at RA is meaningless. Turning a lap 3 seconds faster than you did at the beginning of the day is something to be proud of. But it's got nothing to do with anybody else.
And this is THE MOST IMPORTANT PART: you won't always be faster than you were last time/this morning/yesterday. When that happens just take a deep breath and realize that you are riding a motorcycle on a race track, and it just doesn't get any better than that.