I am also a girl who is not very good, and my excellent one also confessed to me six months ago. I'm just like you. I can't believe it. So I told him, I want to think about it first. A month later, I found that he was serious about me. Then I found a time to ask him out to confess to him, and then we were together, and now we are very loving ~ ~
Advice as a n experienced person:
You first observe and see if he will do anything special to you (for example, if other boys bully you, will he come forward to stop and protect you; I often wait for you. These are easy to see, because boys can't hide, as long as you pay attention.
Ask his good friend.
Generally, boys will be unnatural in front of girls they like, such as: becoming less talkative; Or talk too much; Like to show great love in front of others; Be cool; Help you pay the bill.
After the observation, let's communicate ~ PS. Boys can summon up the courage to confess, and 90% are serious!
Typing is very lucky. Hope to adopt ~
I wish you happiness ~ ~