What do I do?

My long distance bf went to Disney around my birthday and bought me a gift and sent it to me.

He spent a lot of money on me (he has a good paying job but that’s not the point). He at first didn’t want me sending him anything for his birthday which was before mine so I told him ok but he couldn’t get me anything so now I want to get him something… but I don’t make as much as him, what is the applicable amount to spend?