Congratulations!
In my opinion [name_u]Ariel[/name_u] is completely usable for boys and you’re certainly not a ‘bad mom’ for considering this option. [name_u]Ariel[/name_u] has a soft romantic vibe, feels peaceful and has the lovely nickname [name_u]Ari[/name_u]. [name_u]Ariel[/name_u] is very popular in [name_u]Israel[/name_u] so for me doesn’t feel strange at all but rather familiar. If you love [name_u]Ariel[/name_u] I would go for it children are called a variety of different names nowadays I think [name_u]Ariel[/name_u] works.
Good luck