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Your long-winded letter reveals your problem clearly. You are not in fact highly intelligent as you believe yourself to be, but you are certainly immature. As such, you attract similarly immature boyfriends.
Your problems will resolve themselves in time. You will suffer some emotional distress in the process, but that is the price of growing up. Luckily for you, you and your boyfreinds obviously live in comfortable, if not privileged, economic circumstances, so that will be the only suffering you will have to experience.