Does anyone have solutions to these relationship issues? (especially tips from guys!)?

[uga]

Recently, I've been noticing some issues within my relationship that I'd like to solve. We've been in the relationship for years, so I don't think I'm ready to call it quits because of these things, but they are quite irritating! So please tell me what I should do & what you guys think.

PROBLEM: Recently, he's become this big Twitter "fanatic" (for lack of better words). Before, he was never on Twitter, never cared about it and honestly thought it was stupid. But now, he's always checking it from his phone & telling people to follow him.
MY SOLUTION: I've asked him not to check his Twitter/FB when we're together and he does pretty well with that. I'm just worried that he's gonna become detached from our relationship because of it and start spending more and more time worrying about who's tweeting him, what's trending, etc...

PROBLEM: I recently moved into my own apartment by myself and he's there a lot. He comes over and eats the food and uses my saline solution, toothpaste, etc.. but doesn't think to put some groceries in the house or replenish something when it's gone. I get that he's not living there and he's not obligated to do so, but when I brought it up to him he got a little upset when I don't think he had the right to be.
MY SOLUTION: I've asked him to pick up things every now and then from the grocery store, but he'll get the cheapest thing because he doesn't want to spend money on anything, when I spend $150 on groceries that HE EATS TOO!

PROBLEM: Lately, he's been making a few disrespectful, patronizing comments. Sometimes saying things that undermine my intelligence. He says he's kidding, but he usually says it with a straight face.
MY SOLUTION: I tell him that what he says hurts my feelings, and that I do way too much for him to be talking to me the way he does. He sometimes doesn't get it and is just like, "okay well I'm sorry." But it's never really...sincere.

In general, he seems a bit bored with me. I don't know if our relationship is just hitting a bump in the road or what... but these things have been bothering me and he knows it. But I may need to try a new approach. Anything will be helpful! Thanks in advance!!