How can I sort out this problem with my boyfriend?

hiya, you need to find out what is causing these out bursts of mood swings.first thing that comes to mind is he taking drugs.as that causes these kind of mood swings.do you know 100% he is not on any think.you will have to look for signs,as you will never get him to admit it.your relationship is worth saving,but until you know what is wrong with him,all that can happen, is breaking up,not on your part,but he could,whiles he is in one of these moods swings.its a shame when you love someone,and you can't help them,because they will not open up to you.try not to row with him,as any think could make him say or do things, which he could regret later on.good luck,and remember some people don't want help,but you need to talk to him,and try and see what is causing the mood swings.xx