Can't get the the finish line!

So only a few time have I had an orgasm amd cummed even fewer. .. I've done all this reassured and idk what's going on. I go in this "dry spells" sometimes.nothing works and it could last months. I never know what to do. I normally wait out the storm. I should say desert storm since I can't even get myself wet -_- and now I feel bad cuz I have zero sex drive and have been telling my bf no so much. Sex and masturbating just seems like work. Im 20! I should be humping like a rabbit! What's going on? :'(