you're not crazy. I agree some people get too caught up in relationships and it can ruin their lives. I dont know you're story, but maybe youve just had a couple bad relationships and dont wanna go through it all again? Which is perfectly fine to want to take a break.
Its better to focus on yourself. I honestly wish I were like you. Focus on yourself, schooling, success, you will have a good relationship eventually when you're ready. But its fine to not want one right now.