Hello Friend, Good that you are seeking a help here. Such feeling of enjoying loneliness is happening due to you're comfort zone being alone and it's like an addiction. You believe, you are happy only when you are alone.,because your didn't explore the other mode of happiness.. You need some counselling guidance to come out this comfort zone, else you will soon get into  emotional imbalance. It's a good decision to delay your marriage  only after addressing this issue. Feel free to reach out to me online for further evaluation and recommendation.