How to orgasm through intercourse?

Long story short I haven't been able to orgasm through penetration, only once but it wasn't my boyfriend it was my fingers.

I try so hard but every single time I try I end up just having to use my clit to orgasm because my hand gets tired or I start getting dry.

I know this is bad but I've been faking it for our entire relationship and he feels like I've betrayed him but I told him last night and now I don't know what to do because I want to be able to pleasure him but he wants to make sure I get pleasure too.

Help??