fiance got cold feet, need to stay in US

[bobcat]

I have a little problem.... I met my fiance 6 years ago whille studying in US
a year ago I left the country to visit some friends... and we decided to go with fiance visa... now that I am back in US he changed his mind.... my mother lives here...she is married... and my guardian who I have known since I was 11 years old is here.. basically ..my whole life is here.. and I have no where to go back to... I need some options please!... since I am over 21..can my moms husband help me adjust staus? or my guardian is thinking of adopting me... please help