boy problems ....help!! I'll appreciate it!

So I have a crush on a guy at school, not sure if he likes me or not yet. I've been messaging him every so often and he seems interested, except for some reason i l am struggling to find the guts to go and talk to him in person. I am a little shy, but also confident so I don't understand why I find it so hard to talk to him? Please help, wanting suggestions on what I should do too, his in one of my classes and doesn't sit near me so it makes it harder. Help guys x