this sounds to me like the guy in the song's girlfriend left for college, and in the excitement of her new life didn't find time to keep in touch, which he's bitter about. but because he was so hurt, when she did come home for some solace, he hurt her back, and now may regret it. he knows he'll pine for her for a long time, but he love her enough to not want her to feel tied to him because of that. he's trying to let her go have her new life, and figure his way out through his life without her.
this sounds to me like the guy in the song's girlfriend left for college, and in the excitement of her new life didn't find time to keep in touch, which he's bitter about. but because he was so hurt, when she did come home for some solace, he hurt her back, and now may regret it. he knows he'll pine for her for a long time, but he love her enough to not want her to feel tied to him because of that. he's trying to let her go have her new life, and figure his way out through his life without her.