Orgassmmmmm

So basically me n my boyfriend have been together for 2 years I’m 16 n so is he n I feel like I have trouble orgasming like I would feel close n than that feeling would go away n than come back in about 5 mins or less n than when we’re done fucking n he finally pulls out we’d see my stuff come out either on the bed or dripping from my vagina??

Please tell me how I could orgasm also we do alot of fore play like kissing, rubbing myself etc