Hi Apatterson
There is no specific type when it comes to a serious gambling problem, it might be that your boyfriend is just not ready to change his life – yet. Sadly, sometimes a gambler has to be really hurt by his own behaviour before he will summon up the courage to face his problem but all you have said to him about support will, hopefully, resonate with him on some level in the future and he will choose to act.
Promises from active gamblers are best ignored, even with the best intentions your boyfriend is best not trusted at this present time.
Your boyfriend has shared a difficult time of your life with you and that is something you can value but it is important that you do not allow it to cloud your judgement.
I obviously do not know if your boyfriend can change any time soon but I do know that all help given to gamblers regarding available support can and often does, make a difference eventually.
I cannot tell you what to do but if it was me, I would not plead with him to stay. His addiction would almost certainly get a boost if he stayed on the wrong terms.
I wish you well
Velvet