If you are worried enough to fear you may develop it, then highly unlikely! But anything is possible so I can't give you a clear answer. It is good to have someone who is not involved in your life to give you third person perspective like a counsoler, don't hold it in but find support! Stay strong!
There are lots of symptoms of schizophrenia. When my symptoms started to get bad, I had a hard time with many aspects of my life - holding down a job, voices of God telling me to quit my job, crying constantly. Physically, my health was deteriorating even though I exercised daily and ate well. Many things got harder as I started down the path of schizophrenia so you might want to consult a psychiatrist if you're having strange symptoms -such as voices in your head, crying spells, talking to God and deteriorating health.
i am really not happy with my marriage and feel lonely and depressed all the time, can this condition lead to schizophrenia?
No, but it can lead to listening to sappy ballads on the radio
While Schizophrenia has many causes, the only way you yourself can induce it is long term heavy drug use. Have you thought about seeing a marriage therapist? Speaking from experience, they can work wonders.