Should I tell my boyfriend that he not only miss first kiss or just keep my mouth shut. If I didn't tell him am I cheater?

My boyfriend loves me lot.. me too.. he always worry about not being my 1st. actually he is my 4th. he think that i only had kiss previous bfs. so he always saying that" i only miss to be ur first kiss but i will be first for other things.". But the truth is i had done things with exs rather than kissing. like touching their private parts. but i never had sex. i am still a virgin.. what should i do.. should i tell my boyfriend that he not only miss first kiss or just keep my mouth shut. If i didn't tell him am i cheater? Till i met him i was being loyal to him. but i can't change past. i felt guilty about past. what should i do.. tell or not?
Should I tell my boyfriend that he not only miss first kiss or just keep my mouth shut. If I didn't tell him am I cheater?
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