facetime

my boyfriend asks me like every day to facetime, we are in high school so we dont live together and neither of us have our licenses because we havent been able to take a drivers education course so we are limited in the time we see each other. most probably think its sweet that he wants to facetime a lot, but the truth is, i dont really like facetime. i find it awkward and i usually just sit there and listen to him play x box. i have already told him that i dont really like facetiming bc i get uncomfortable sometimes, but he still asks a lot. and i feel like i make him sad when i say no. what should i do?