Sabotaging my sensitivity!?

Betty • 💜The perfect sex life is an ideal mix of making love and getting pounded!💜
Okay so a little back story, through my youth I was never really a masturbater. I wanted to be, I was super horny and boyless but whenever I tried it was like... This is it? This is lame. When I finally did get a boy, we were having sex for about a year before I started orgasming. Once I started though, they continued to get easier and easier and now my SO can make me come at the drop of a hat. Before you hate me, here's the problem. Now I'm really starting to get into masturbation. I have a vibrator, I really love it, but I'm really paranoid that it's going to desensitize me! I really like coming so easily for my man and I don't want to mess with it, I know too many vibrations can mess with you and make you 'dependent' on them to orgasm. Is this something that will only happen if I'm using them excessively? Or should I be limiting my use if I want to stay this sensitive? Any advice or experience stories would be greatly appreciated!