My boyfriend (22M) refuses to drink water unless I (24F) dye it blue and call it gamer juice.

I know that this post seems completely ridiculous, and trust me when I say that I think the same. I'm at my wits end here.

My boyfriend and I have been dating for about a year. I'm a casual gamer (I play just a few hours a week) while he's much more invested. He dropped out of college, and when he's not working at his part-time job, he's playing video games. This usually doesn't bother me, as he often invites me to play with him. He's a good boyfriend in every other way, and always manages to make time for me despite his gaming "addiction".

My boyfriend is about 50 pounds overweight, and I'm sure this can at least partially be chalked up to his lack of a healthy diet. He rarely eats anything actually healthy, and while the two of us have tried to go on a diet together, he quit after about a month in, and gained back the five pounds that he lost within two weeks. He very rarely drinks water, and usually prefers soda or Redbull. Needless to say, he's really unhealthy.

Recently, one of his online friends mentioned something called "gamer juice", and my boyfriend asked me to make it for him. All it consists of is water and food coloring, and I assumed that he was just memeing, so I figured "why not". I made him the water, and to my surprise, he actually drank it.

The next day, I tried to give him some actual water, and he completely refused to drink it. I feel like I should at least be trying to get him to drink some water, because it's incredibly unhealthy that he never drinks any, but I think it's totally ridiculous that I have to do this for him. It seems childish, and while I chalked the first few times up to a joke, it's pretty clear that he's serious about this. He doesn't want water; he wants gamer juice.

So, Reddit; what do I do here? Do I keep giving in to his gamer juice demands, or do I be honest about how insane this whole thing is? Help me!