It would be a good idea to start by letting him know how you feel because some guys find it hard to open up. It might take some time to develop that level of intimacy and trust. A new relationship can be an exhilarating emotional roller coaster, making it initially challenging to identify your feelings. Do not immediately inquire about the large L with your guy.
He learns at a different rate, so putting him on the spot too soon might make him feel awkward. There is never a right or wrong time to show your love in a relationship. Reflect on yourself and try to find the right time. For instance, you might wait to inquire about his feelings for you until you feel more assured.