The girl I like ignores me. She said she had a boyfriend and told me not to call her again and send messages … I know she didn't, but she lied to me … ...

Redemption, you get it, and then you lose it, but from then on, this is not redemption, this is pursuit. Now that you know that he doesn't have a boyfriend, you still have a chance to be true, but you should at least take some actions to chase others. It's not enough to just send text messages and make phone calls. You must start from all aspects to make her feel that you are serious and sincere. The previous dedication is not obvious and must be done. Also, since people have obviously rejected you, you should stop saying things like I love you and take more concrete actions. As usual, good friends start first.