What can I say to reassure we are going together so that I dont sound eager or doubtful?

So. its a long story but short I am supposedly going to ringdance with this boy that likes me. I like him too but im iffy about how I feel because he doesnt really tell me his feelings. So he was supposed to be going with me because he said yes then outa nowhere he says he has to tell the other girl he cant go with her. Now i hear from some associates (not friends they just wna b n my business) that he is supposed to be going with another girl other than me and the girl he was gna tell he cnt go. Now idk if he told the girl or not but right now I dont really care. I just want to b reassured that HE IS going with ME!. How can I ask him if we are still going together to ring dance without bringing in the two other girls, sounding doubtful or sounding eager??? thanks in advance. Please help me because this is bothering me. and I want to enjoy my 4 day weekend.