Should I? (HELP)

Ok long story. So I'm in a school where there's 2 different schools in 1, (Ya I know crazy right?) and there is this boy that is in that different school. I see him in halls everyday and I have 2 classes with him. Now I've developed feelings for him and now I wanna ask him out to go with me and some friends to a haunted house or something... The question is: should I do it? Like he's in different schools but we have 2 classes together... I know he likes me because he told me and I told him that I like him also but is it the right/safe thing? The only thing holding me back is that he's in a different school. We see each other everyday and on weekends but I feel like there is something missing... I don't know, PLEASE HELP.