Disturbed mind. Which tires my partner?

I am 38, year old investment banker. I have assessed myself to be too much engrossed with the pleasures of sexual comparability, that most times I cannot take my mind off of it. I get multiple orgasms and and unsatisfied desires even after a full session. Most times this cause tension between me and my partner as her satisfaction levels are reached much before mine. At times I get jittery to believe myself as sexoholic but then this irritation is not helping me and at times forces me to think same thing for multiple women. I don't know if it's normal to be so much sexually active at this age, but not something I have regret for. Would need your views on: 1. How to stop thinking of sex all times 2. Is there a way to shorten the time span as my activity ranges around 45 minutes to 1.5 hours which tires my partner Thanks.