Sexual partners

Tia • 17 Manchester ✌🏼️
So I've only had sex with one person, my current boyfriend and we've been together for two years now... 
Don't get me wrong I love him to bits and I wouldn't change him for the world, but he's had sex with numerous girls (before me). 
So sometimes i resent the fact that he has and wish that I had as well just so I know what it's like? And I don't know if this is normal or what? Am I the only one that experiences this?