<human>: Can you succinctly summarize the text in 1-3 sentences?

Back story: I [21F] have been on a LDR for a year with C [28M]. Long story short, we are engaged and are in the final step of the K1 fiancée visa process. 
My mother [51F] has been in a toxic relationship for the pasted 13 years  and now she's considering leaving her boyfriend [58M] to live with me and my SO in America. 
Plus: I just went through a traumatic experience by seeing a corpse from a guy that was executed with a head shot on my street last week and that was incredibly shocking to me. 

So now I have to prepare my documentation for the interview with the consulate, write myself a recommendation letter, quit my job, visit my whole family before I leave the country, say goodbye to all of my friends, give away my cats, sell all my shit and pack. All in 2 months. I'M FREAKING OUT! 
I froze up, I can't take the first step, I feel all alone, I don't feel like my fiance is supporting me like he should, I'm starting to think I'm a burden to him, because all I talk about now it's problems, I feel like. I'm boring and unattractive. I feel like I'm my mother's mother, because she's wants to break up with her boyfriend but she's hurting so I have to support her and tell her everything will be okay, when I don't know if it will. 
I don't have much of a choice: or overcome my fears and deal with it or I lose my chance and possibly the love of my life. The question is how to get myself to focus and have the strength to do everything on my own?
<bot>: I'm struggling with the lack of support from important people in my life and I feel like I won't be able to do all by myself