Should i runaway and bring shame to our name or stay with my family?

my family is accusing me of seeing someone else and telling me this is the reason why my arranged marriage is not working out. At first things were good bw me and the husband yet after gettting to know him a few months i felt i couldnt be happy with him forever...he's from our country knows no english no skills, no personality to me, different ways of thinking, and i'm always so happy yet lately have neem nothing but miserable i also could not bear his children...everything i felt was gone. then i went to my ex-lover and have rekindled that? even if i am not with my ex i never want my arrnaged marriage husband.what should i do. they say if i runaway to never come back. what should i do????they say i have NO CHOICE IN THIS MATTER but to FIX IT!!!please help