relationship advice needed!

Alright, so for a little over a month I've been talking to this guy I really like. I gave him my number at the end of the school year and we've been talking ever since. Most days I feel like our feelings for each other are mutual (he sends me sweet good morning/good night texts, sends me anything he thinks I'd be interested in, asked me to see a movie with him, etc.) but lately I haven't been feeling it from him. Obviously, he's a lot busier than I am, since he's working 8-10 hours a day 3-5 days a week and also attending sports practice pretty regularly. But sometimes I will go 2-3 days without hearing anything from him, yet he is active on social media. When we go that long without talking, it's usually me who initiates conversation because I get so tired of waiting it out. I'm young and could definitely use some more patience, but I feel like 3 days is a long time to go without acknowledging someone's existence. I'm sure I'm reading into it too much and there's nothing wrong, but previous relationship experiences within the "talking" phase have dwindled my trust down to a pulp. What should I do if things don't start picking up again soon?

UPDATE 7/31

I still haven't heard a thing. We last spoke on the 28th, and the 25th before that. I am nervous to tell him how I feel about this, because I'm sure he's just busy and not purposely ignoring me. In a previous relationship, I was actively being ignored and when I explained how it made me feel, he ended things with me. I know that it had been for the better, but it completely devastated me and I was unable to even think about dating until a year afterwards. I don't feel like the guy I'm talking to now is the same way, he's definitely different, even if only a little, but I still fear the outcome. I enjoy his presence so much and I want more of it, I don't want to ruin things just because of MY trust issues. Will update further. Sorry if this isn't really asking for advice anymore, it's just venting at this point, but it's very necessary and again any advice or similar experiences would be much appreciated ❤

UPDATE 8/1

Today he texted me without being prompted to, apologized for being so distant and explained that between work, sports practice, and family responsibilities, he's barely even had time to sleep. I told him that I understood, and also that I missed him, and now we're talking just like we were before. I missed this a lot and I'm really glad it was just a matter of him being busy and not him getting bored of me and throwing me aside. :)