is this pisces man not interested anymore is he just busy? plz help

i texted this pisces (im an aries) guy that stared at me a lot in class (also stared when i was talking to guy sitting next to me) but also was nice to me and helped me out (he answered a question for me, calmed me down when i felt nervous and asked how i felt afterwards) , to return the favor and tell him that i have the textbook he wanted and we ended up having a long conversation. He was the first guy i ever met who would reply in long paragraphs, he seemed very sweet and i figured that i want to know him more. i asked him if he still wanted the book he said "hell yes" and i told him to message me whenever he is free so i can give him the book and if he'd like, we can hang out afterwards for a bit (my way of wanting to get some alone time with him). he said yes and that he would probably message me on tuesday. tuesday came and he messaged saying that he pulled an all nighter and was sleepy so he went home and asked he said "i will grab the book off you on thursday? " i told him that it is all good he should get some rest and that i have class on thursday plus a birthday party to go to. he has not opened the message and it is saturday and i havent heard from him still.

i will see him in class in about two weeks and i dont want things to be awkward between us and i dont wanna text him first cause i already texted two times first to remind him of a due date and the thurd time abut the book. so dont wanna come off as clingy