I am a virgin but my boyfriend isn't, what can I do to make less painful and more pleasurable?

I want to loose my virginity to my current boyfriend. My boyfriend isn't a virgin but I am and I want to loose it to him without pain and hurting after wards but I want it to be pleasurable to him and I both. What can I do to make it less painful and hurting to more pleasurable and amazing for the both of us. Please help.