My dear Jack, I’m not sure you can handle what you’re getting yourself into. Someone needs to advice you. The issues in your relationship are not small – your girlfriend cheats on you, gets drunk, has suicidal tendencies, and it’s a semi long distance relationship. How are you going to cope? Each of these issues is a major in itself not to talk of all four together. How are you going to handle all four at once? Each has the capacity to break any relationship.