What does this text interpret to?

I met a guy a few days before the school year ended & we really got a long. We saw each other a few times that week and exchanged numbers. He's vacationing for all of summer vacation and will be out of the country but before he left he texted me to say have a great summer and keep in touch. What are the chances this could be a sign that he might like me? or is it a clear cut friends messages?