Should i just let him go?

Ugh i recently moved 650 miles away from my bf. we both agreed we wanted to stay toghther. except the other day he told me "it just not the same idk if we should stay toghther" I didnt understand why he was saying that he tells me he will always love me and i really love him. I then found out why, yesterday one of my friends told me he likes another girl. I freaked out and he told me he unsure if he likes her. and unsure if we should end our relationship. I told him i dont want to end it im just not ready to move on. Im still in love with him and i havent started school yet to meet any nwe people, but he has. I am just not ready to let go and to let him be with other people and im nto ready to be with out people. We talked it out and i asked if he could think about it and i told him i just want us to stay toghther for a bit longer untill im ready. but all he tells me is "what the difference between now and later?" i dont know what to do? should i just let him go. It killing me to know he interested in another girl after i been gone only a week. Im still hopelessly in love with him.