Yes, therapy I think would help you and so glad that you're looking into it. It's awful to feel the way you do, and to be honest, I think we all have those feeling sometimes, I know I do - it's horrible for sure. But I think you'd really benefit with getting help with keeping them under control, as its also horrible for someone else to have you read more into stuff that was ever there. I wish you lots of luck with that, and sending a hug.. It's going to be very tough with him losing him parent, and am afraid that you'll probably have to take a back seat for a while and just support him from the sidelines. This is natural by the way, he'll have so much to go through, emotionally and with all the practical stuff of being with his family at this time. When my fella lost his mum last year, he stayed with his dad for a month, even tho we're only 30 mins away. All I could do was just be there for him, if and when he wanted it - him and his pop had to go through it together.

As for the family. Why are they like that with you? Have they ever told you? It seems very strange that it all comes out of thin air. Was there a misunderstanding along the line, that gave them the wrong end of the stick with you? I was wondering if you could get the chance to clear the air.
Does your boyfriend stick up for you with his family? I hope so.