I lied to her. Help me!

Here's what it is... we text eachothers very often. Now one 일 while texting, she asked me do i 사랑 her 더 많이 than any1 else. I told her i do. And we talked about a lot of romantic things. I asked her if i can hug her. She said i can...next 일 in school i asked her about last noon. She said it was her sister who wrote . And yes, after i said i 사랑 her she said she loves me too. I mean her sister.now i got very sad and angry and i said it was my bro who said i 사랑 당신 and the other things. Now She thinks it was my brother who texts her. Now what shud i do? Im tired of lies. What if the truth hurts her? Help me !!!