The `Poker Face` singer - who is currently single - admits she has been forced to put her love life aside to be a successful pop star and is too "weak" to make romances work.
She said: "My greatest sacrifice is love. I`ve only ever been in love once, and I had to walk away because I had to put my career first. He wanted me to stay at home and be with him; I wanted to be out there trying to make it on stage. It was a huge lesson for me, but it`s also a source of sadness. God gave me a gift with music, but if you have gifts you also have weaknesses. My weakness is not being able to make relationships work."
The 24-year-old star has been on numerous dates over the years, but has decided to choose music instead because it won`t ever break her heart.
She added to Live magazine: "There`s something in me that stops me ever putting a relationship before my work. I guess I always think my music is never going to roll over in bed one morning and tell me that it doesn`t love me any more. I have to believe the music is worth the sacrifice."