Potato,
Here is the decision you must make, and this is just my opinion here. Do you want to be married to a woman for the rest of your life who does not wish to have sex with you? Notice I did not say who will not have sex with you. If you think about it, you probably understand the difference. It rips your guts out on a daily basis to be in love with and desperately attracted to a woman who regards you as a friend.
Yes, she sounds like a fun companion, when she isn't igroring your birthday, but how much is that worth? The difference between a marriage and a friendship is a ring and sex. Sounds like she does not contribute much to the relationship in the way of household duties either.
Now, you have a couple of other problems. If she is truly sucicidal, you have more reason to leave. Do you want this woman raising your kids? Staying because "she will kill herself" is just blackmail.
If she has family members who are threatening you, call the cops, get a gun and learn how to use it. Chances are they know she has a screw loose and they want you to handle the problem. Either way, their threats are wrong and illeagal. Do not hesitate to use the law to protect yourself.