Let me talk from experience and as a man. A relationship will onlyslow you down if your gaol is to be the best (math, physics, dance, looking good, you name it). If you settle for the average mark/rank in anything, a relationship is okay to be your priroty. To me, looking back, I can see that I have always been the top student becase I was naive and did not care about relationships. Later on, I had relationships with women, and there was not enough time to concentrate on higher goals so I became average. And believe me, the relatonship can just be family/riends/social and not necessarily sexual, but none-the less you need time and energy to maintain these if you have to meet and talk often. If yo look at history, most inventors have been in not very successful marriags, and some were complete celibates or monks. Even musicians who are successful have to spend a lot of time learning new things in music and they are most of the time single or in nit very good eationships. Itr is a choice you make: wanna be mediocre, get an average degree and get a job and make family, or you wanna be Einstein. Someinventors were even monks. I starte lving a monastic life two years ago and now I have had enough time to learn yoga and meditation, now I am learning guitar and singing, making a lot of progress, and I also read new math/data-science papers to be the best at my job. So there is no "yes" or "no" anser to your question. You cany forego a relatisonhip till to get your degree and et a job before you start one, but as soon as you get a job and starta relationship, your salary will be increasing but you personal development stops. It is a choice: relationship/family, or genius.