Nobody likes rejection. But the way to get so it dosent bother you is get rejected more so you get used to rejection. Kind of like if your afraid of asking women out you should approach like a hundred women in one day and ask each one out. By the end of the day you will be use to rejection. (You may have no self confidence as will if your rejected by 100 women straight so that would be the downside). But at least you will be desentize yourself to rejection!