I lied to her. Help me!

Here's what it is... we text eachothers very often. Now one dag while texting, she asked me do i love her meer 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 zei i can...next dag in school i asked her about last noon. She zei it was her sister who wrote . And yes, after i zei i love her she zei she loves me too. I mean her sister.now i got very sad and angry and i zei it was my bro who zei i love u 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 !!!