If you want to be in a relationship with someone, and you’re keen on the idea of monogamy, my advice for you is to fill your life. Fill it with people who aren’t that other person. Add friends, and hobbies, and Netflix box sets that you greedily devour on your own. Try holidaying on your own, or walking on your own, or going to the pub with a good book for a quick pint on your own. Try having conversations with strangers on the internet about things that interest and excite you. Fill your fucking life.