Adjustment of Status - I-485

Dear All,
I live in NY and was a silent reader for many months and really need your help or advice now... Kindly read this..

So, I use to come to USA on a B2 (visit visa) every year to spend my vacation and visiting friends since 2014. The last time I came (3rd time) in 2017 and during my stay, i met a girl working at one of my friends business and we started dating and she lied (which i find later) to me that she has brain tumor and don't know when she gonna die. So i got a little emotional and told her that i am here for her.. In short we finally decided to live together and later on got married.. Even though my friends told me that don't get married to quick take your time.. but i never listened to anyone and trusted her.. I asked her many times that lets go to the doctor and let me see your medical reports may be we can find a good doctor, but she never did and i didn't even forced her, because she always take some medication and take money from me, like $300 to $700 every couple of weeks to buy medicines...anyways we filed for the adjustment of status by the end of 2017. Now its almost 2.5 years that we were together and i have my interview next week. But we had some arguments because i find out that she lied to me about brain tumor and some other issues, when one day she said that she is fine and don't have brain tumor any more. Also we have fights in the past 1 year on different issues such as not giving priority to each other, when i go out to play sports with my friends and you know like small small matters and she is not living with me any more and went back to her mothers place.. Because she said that she is not comfortable leaving with me anymore.. I need your advice if i should go for the interview alone or should i don't go and contact a lawyer? I am very sad and depressed that i trusted and loved someone and at the end she really don't care and top of that she is threatening me that this is a woman country don't even go to the interview, i will get arrested and deported... she never spend anything and on top of that whenever she wants to buy anything or use to pay her credit card or uber bills... she take money from me.. whereas when we were dating she even told me that she will help me in rents and bills etc.. But she never did...Now, I just want an advice that what can I do and what options do i have... Thank you for reading... May God help us all.