I don’t know what to do!

So in February, I met this guy in an app called “amino” and he always liked me for me, and just love how my personality is and he told me about all of his past, like since his childhood until like last year. And I did the same thing so it’s kind of fair. And now we call every night and he just have faith that we will like “marry” someday in the future and “meet” someday, but Im not interested in long distance relationships.. plus I kind of don’t feel the same way he does to me. And I just feel bad whenever he confess to me (he likes to confess a lot) and I just like say no. But it hurts saying that to him, because I know like what he feels, but I also need to be honest. And also he’s not the same religion as mine and I’m not really comfortable sometimes with him. And I really don’t know what to do, he’s really sensitive. And plus I’m having my finals soon and I don’t want all this to bother me so I feel like I wanna fix this before my exams. If anyone’s reading this, what do you think? What should I do?