Questions about masterbating!? Feeling worried!

For all of the ladies out there who have had sex before!! I am a single 20 yr old and have only ever masterbated, i started masterbating when I was probably around 15 or 16 and have done it off and on since then. I have never had intercourse before and have only ever touched myself. Someone told me the other day that if you masterbate a lot that intercourse doesn't feel as good or it could ruin your sex life. I am starting to get worried for my future SO and my future sex life. Those of you who have done both.. Has masterbating effected your sex life negativitly?!