<human>: I'm engaged to a woman I love and respect, but feeling pangs of anxiety and loss of sleep, and a cold feeling in the pit of my stomach.

I have known my fiancee for 1 year but we have only been exclusively together for 7 months. I felt some pressure (mostly from myself, a little from her) to propose marriage because I will be leaving the country permanently in 3 months. We both knew that if it was going to happen, it would need to happen on a short timeline. Doing long distance is not realistic in this situation as we will be very far away, finances and work schedules would make it impossible.

I really do love my fiancee- she has never done anything inappropriate to deserve a broken engagement, she has all the things I'm looking for in a woman, but mostly I feel a sense of anxiety when I think about getting married. I feel like I have about a month to make up my mind about a decision that will last a lifetime. I'm stuck in a situation where I face either regrets about breaking it off or regrets about getting married... any ideas for how to proceed?  I should note that no date has been set for a wedding, and no wedding preparations have been made- the idea is I would fly back for a wedding a few months after my departure.

Can you condense the text into a few key points?
<bot>: Got engaged when I didn't feel quite ready to a woman I love, and feeling anxiety about marriage. Leaving the country and must make a decision to either break it off or get married. How to proceed?