Is this a dead-end relationship?

We’ve only been dating for a little over 2 months. We met at college and he is currently back in his home town for spring break (will be back on the weekend). He has seemed miserable since he left, we’ve just been talking through text messages… but he’s been extremely down. He posted this on his twitter last night: “Its like everywhere I f*****g turn, life is shoving her back in my face.”—I’m 99% sure this is about his ex-girlfriend, who is back in his hometown. I’m worried that the reason he’s been so miserable is because he misses her. Before we started dating.. he admitted that he still “loves” her, but wouldn’t get back with her. What do I do? Is he caught up in her still? Is this a dead-end relationship? By the way, he is 19 and I am 18.