<human>: I'll try to make this short as possible. When my boyfriend's mother was in her early 50s, she began exhibiting erratic and socially unacceptable behavior for no apparent reason. Over the course of the next ~eight years, her condition deteriorated until she was aphasic and could not care for herself, and she eventually died of pneumonia as a result of weakened immune system. At some point, his family found out that she had a particular mutation causing frontotemporal dementia. It seems that her mother had it, too, although at the time they did not know what was happening to her.

Although our relationship hasn't been established that long (8 months), I know this is the man I want to marry, it's just a matter of waiting until the time is really right (we are both currently grad students). The worst part of the situation is that the mutation his mother had is autosomal dominant -- meaning he has a 50% chance of having inherited that same mutation from his mother, and if he did, he will be afflicted with the same disease she had. He just recently got the test done that will tell him whether he inherited the mutation, but we won't know the results for weeks.

My real question is, has anyone here dealt with anything like this before? I don't know how to support him, don't know how to help him, and if the results come back that he does have it, what then? How do we deal with something like that? It won't change my wanting to be with him -- 30 years with him would beat a lifetime with anyone else, but I just wanted to reach out and see whether anyone else had any advice as to how to proceed.

Could you distill the essence of the text into 1-3 sentences?
<bot>: In a few weeks, my boyfriend will find out whether he will develop early-onset dementia. Any advice for how to deal with potentially bad news?