AIO bc my bf said I am high maintenance and that I "need extra love and attention"?

My (18F) bf (24M) and I have been talking for about 2-2.5 months and have been officially dating for almost a month. I try to be a good girlfriend...I bring him home cooked meals at work, I bring him his favorite smoothies and sometimes make them myself, I bring him breakfast and lunch, I see him often and I am supportive. However, I feel like I am just annoying him by seeing him so much or texting him. He will often text me first and say he misses me, and vice versa. He says I can come over to his house a lot, but then last week he said some alone time is good- which I completely understand- but it was just very sudden. That got me starting to think I have been around him too much and now I'm spiraling into this overthinking abyss. And now this past week he called me high maintenance and said "you just need some extra love, care, and attention." Maybe I'm just overthinking, but I feel like he has been less....happy with me? I understand a relationship isn't always going to feel like the "honeymoon stage" but I just feel like he is getting sick of me. I mean, I wouldn't blame him- thinking back on it, I have been spending a lot of time at his house and stuff. It's just that he has stopped planning dates and stuff. We haven't really been on a date since he asked me to officially be his girlfriend. Am I overreacting or overthinking? I also have been spending most of my money. He never seems to want to do anything anymore. It's like once we became official, we don't do anything anymore besides spend time at his house. He says he doesn't want to spend money, but just bought himself a cool gadget. Am I overthinking? ANY advice would be greatly appreciated.