<human>: As it said in the title, my boyfriend (16/M) and I(16/F) have some fashion issues. We've been dating for six months and some odd days. 

He wears these ratty sneakers EVERYWHERE. They literally have holes in them, and no matter how many times I politely point it out or ask him to please throw the damn things out, he uses the same excuse, "These are *mine*, and I'll throw them out when *I* want to."

His grandmother bought him a perfectly good pair, and I've seen him wear them, I think, twice. 

As a girl who plans out what she's wearing, it irks me. I always try to look presentable for my boyfriend, I don't want people thinking he's dating a sloppy, hobo-appearing girl. 

Well, I don't want people thinking that I'm dating a sloppy, hobo boy. He's generally very good about his jeans and t-shirts, never wearing too much bright colors or too much dark colors, a good mix. He'll have an off day where he's wearing a bright shirt and light jeans, but he's a human, I expect it. His ratty, old, falling apart sneakers are the only thing he wears on a day to day basis, except for when he's in JROTC uniform. 

Not only do I want him to be presentable, I worry about the arch in his foot falling because I doubt the ratty sneakers have any support in them anymore. 

So, my question is: How do I get my boyfriend to throw out his ratty sneakers without being a controlling bitch about it?

Could you distill the essence of the text into 1-3 sentences?
<bot>: My boyfriend wears ratty sneakers, and I want him to throw them out and start wearing his perfectly good new ones for arch support and to look presentable.