How often do you have to have implants re-done?

I would love to have larger breast. I am a small B. Would love to be a full large C or D cup. All my life I have been made fun of for having small breast. Itty pitty [RS bleep] committing is the club people told me I belonged to. I just want to feel full in my breast area and put on a bathing suit and see them. Do implants feel like real breast?