So I've been staying in London with my cousin for the past couple of days, and I've started speaking to this guy from her school, he's in year ten and I'm in year nine.  I said when I go back in the summer, I'll go and see him. I like him and he likes me, but we can't really talk for the next few weeks because he's revising for his mock GCSEs; he's also worried that I'll forget about him before I go back, I live in Liverpool and he's all the way in London. How do I continue to like him and keep me in his mind?