I'm going to confront my crush for lying
Why did your crush lie to you?
We were doing a school project together, he said he would help me, but then he didn't.
Sometimes we say things with the best intentions, but then things don't work out the way that we planned. Lying to someone we care about is the worst sort of lie, so we should be careful to ensure that we can keep our word when we say we're going to do something. Your boyfriend should apologize to you and promise not to lie again.
I can't forgive him yet, he needs to apologize asap.
Before you insinuate that they lied, ask them first why they weren't able to be there to help you. Hear their excuse out and see if they are truly sorry for being late.