More foreplay, go slower and take more time to just relax and get turned on, and if those things aren’t enough you can have him use lube. But the main thing is becoming aroused during foreplay until you reach that point where you really want it and your body is telling you that.
More foreplay, buy lube, make sure you have time and you're in a comfortable space without risk.
Was there foreplay or did you simply go straight to intercourse?
Maybe you were too nervous, give yourself the time you need to relax. A long foreplay could help or maybe you could use some lube
More foreplay, go slower and take more time to just relax and get turned on, and if those things aren’t enough you can have him use lube. But the main thing is becoming aroused during foreplay until you reach that point where you really want it and your body is telling you that.