mobile

So a couple of months ago, i rooted my phone (Gs3 Sgh-T999). And last month i finally decided to download a ROM. After doing so it was going great until my phone would reboot and get stuck on the reboot screen. So i would end up having to factory data reset and loosing all of my apps and stuff. After a while, i couldnt take it anymore. So with research i thought i just needed to update my firmware. So i did. And for about 2-3 weeks. Everything went fine. Then it started once agian. So i would boot into safe mode and delete the app i recently installed. One i started do that, I had no reboot issues. And i stopped downloading apps in general. And it worked... Until today. It rebooted and got stuck. I lost my cool and got furious. So i told myself, tommorow, im going to download a new rom. But i thought occured and i wondered what if it just does it on the other rom. So what i need to know, is, is it the rom or my phone and certain apps in general making it reboot? The rom im using is AOKP Jelly Bean Rom. 4.1.2 My firmware is T999UVDMD5. If there is any suggestions or help you can give me, please do so, idk how much more i can take. Thank you.