he may be stressed out due to work and wanting to spend more time with you then he is able to and worried sounds to me like he is insecure and it sounds to me like those insecurities may be coming to the surface or maybe he just needed to vent to someone he felt close to and trusted i believe u may be reading into it to much. i have been in my fair share of relationships that didnt end on the best of terms and they have left me feeling broken alone and unworthy of love try to just be their for him and let him vent show your supportive it may just be that he is not very happy with most of the things in his life and he is scared that he will lose the only good thing keeping him going (YOU). men make it seem like nothing is bothering us most of the time we keep our problems to ourselves most of the time so if he opened up to u like that it means he really trusts and cares about u alot.