My boyfriend isn’t independent

Hey, so I’m and 18 year old female and my boyfriend is 17 years old. This is a normal age difference but I feel like our maturity levels are so different. We’ve been dating for a year now. We’re both seniors and he asks for help on his homework from his mom almost every night. He usually always sits with his mom when he does anything. He tells me he doesn’t like going shopping or running errands on his own and usually asks his mom to come with him. I asked him “when you’re able to go do the doctor’s on your own, are you still going to bring your parents with you?” And he replied, “yes, at least the first time so they can show me what to do”. I don’t understand why he wouldn’t just go to the appointment and stand on his own two feet and figure it out for once.

The fact that he still needs his mom for things is just a turnoff for me. It’s possible that I could be jealous at the amount of attention he gives to his mom. I’m at the point where I haven’t asked for help on homework since middle school and I frequently go out shopping by myself. I would consider myself very independent.

I told him that this is essentially a turn off for me, but I feel bad. I almost feel like it’s attacking his character. Does anyone have advice?