Don't try to ride as fast as your friends just to keep up. It's ok to push yourself but stay in a range you feel comfortable. You'll get faster automaticly the more experience you gain.
The guys I'm riding with do 100+kmh on the easy to overview runouts of our resort, but they have 20+ years experience. 125 was max one of them hit on our perfectly groomed and empty black slope (with reducing wind break by riding without jacket).
Albeit I'm riding many moons, my limits are well below. I'm rather cautious and my top speed depends a lot on the board I'm riding. With my long/stiff Jones Flagship 158 I do 80kmh with confidence AND fun. But with my shorter softer Ride Farah 153 I'm only confident up to 70kmh. Hit 90kmh with the Flagship once, but this was beyond my "comfort speed limit". Not because of the board, it still was completely stable, but for me this speed was simply too scary.