Time/ how do I tell my bf how I feel

Me and my bf have been together for a month and a half. Yes this is my very first bf and in the beginning we had a lot of time to talk to each outher and we even went to sleep on the phone at night together. So now he is busy with school and his sport so he really don't have a lot of time to talk to me no more but me I have a lot of time and idk how to waste it. I m trying to ask what can I do to waste my time? My outher question is how do I tell my bf how I feel??????

I just tried but he thought I was leaving him so I just didn't tell him how do I tell my bf how I feel???????