Negative Prophecies Concerning Engaged Couples - Listen Or Ignore?

What do you do when you are told not to go ahead with the wedding because.......

I'm in a 5year relationship with a loving and caring and honest guy. We have the intention of having our introduction later this year. We had previously sought the face of God on our union and had gotten the go-ahead but it has always been with a "but". 

That "but" is threatening to tear my relationship down now. The "but"= his family. I've met his nuclear family over the years and they were civil but not so friendly. These are people he would go to lengths for but about 2 years ago when he lost his former job, they deserted him and left him to himself. 

Only his aged father supported him in the meager way he could. There's a history of well-to-do wives dying suddenly in this family if I may put it that way. His mum is late: she was very industrious. His uncle's wife too, another industrious woman. The other women alive are just in the middle;not rich, not so poor.

Last year, I went for a 7-day prayer and fasting program in Lagos. While there, a man of God asked me if I really wanted to be with bobo. I said yes. He then told me that If we eventually got married, I would spend most of my time bombing heaven wih prayers because of my husband against his family. I didn't really think that was bad cos I felt it was normal for a couple to pray for each other until he said they (the family now) would try every means to be first in his life. And that when they see that he's not having their time, they'll eliminate him.This scared me cos I don't wanna be a widow in my prime and more because I'd rather leave him than lead him to his grave.

Last week,my dad called me and said i'll have to weigh the costs very well. He said some visions have been pointing to the fact that I hve to re-examine my realities wv my bobo with emphasis on his family because as a Yoruba lady, I'm marrying the whole family *rme*. 

 I'm extremely confused right now. I love my man but I don't wanna die young. Neither do I want him to die young too. He got a better job this year and sometimes I ask myself if I'm being a fool for listening to these voices because I stood by him in his tryin times and I wouldn't wanna be fooled outta what I'm supposed to enjoy. 

Please don't cuss me out. Just give advice pls. It hurts to hear his happy voice nowadays when it seems a breakup looms.

*ah this one is hard for me oh....all the best with whatever decision you take.