The boy who has a crush on me is indifferent and doesn't return messages. I can't let him go. Can I keep sending him messages? If you don't pay attention, go directly to his house to find him.

Actually, I can understand your thoughts. This is what you think when you are impulsive. Before you plan to do this kind of thing, you take five deep breaths and then do it again. This gives yourself a chance to buffer. Let yourself think about the consequences of impulsiveness.

Maybe he was busy and didn't reply to you in time, but if you keep sending it, he will know that you care, so if he can accept that you are fine, if not, do you still have a chance to be friends with him? I don't think so.

So, I suggest you give him a chance and find a chance to tell him your thoughts. If he is interested in you, you can continue. On the contrary, don't take the initiative, because girls are more active. If boys don't like it, it may be counterproductive. We should have a good proper limit.