Hi Danny, from what you are discribing it sounds like this person you love so much is somewhat on the selfish side. In a long term relationship, that can get very lonely.
It is no wonder your head is all over the place, you are not getting "your" needs met. Also, if you even think about having something long term, from what you discribe, I don't think she will make a good mother either. The needs of "others" are a bother to her. She may even have Narcissistic Personality Disorder, if that's the case "run".
Here is one link to look at:
http://www.pamelaspunch.com/are-you-...-a-narcissist/
being so frustrated you feel like crying, is a red flag to me.