How do I reject my friend?

A close friend of mine confessed completely out of the blue over text. We were not having a conversation prior to his confession. He just sent it out of nowhere which makes me think that he must have been dwelling on the thought of telling me or not for a while. He has been confiding in me for about half a year now over FaceTime calls every night (used to be nightly and now maybe every other day or once a week) over issues with his parents and his last breakup. I was always scared that he would end up attached to me because it seemed that he was always very vulnerable with me and depending on our conversations at night a lot to help him get through the night, but as a friend, it was hard to reject his calls because he was going through a rough patch and I didn’t want to push him away because it seemed as though he really needed my emotional guidance. I didn’t want to get ahead of my self and push him away for no reason so I told my self to not overthink it and just treat him as a friend. Which I do. Female or male I am often the type or person my friends reach out to when they need guidance so he is not the only person that I spend most of my nights talking to about life. Our friendship means a lot to me and I don’t want to lose him as a friend, but I don’t know how to tell him I don’t feel the same without hurting him. I also don’t want him to feel like he made our relationship awkward. What do I do?