Question Summary:
Am I married to my ex-boyfriend?

Question Detail:

In the past I met my bf (ex-as I no longer do this sort of thing anymore) in private. By private I mean just me and him having a stroll through the park alone without any friends, however there were many people who did pass by, we were silly and said things like “will you marry me, yes I accept”, and declarations of marriage; people may have over heard our convo and who happened to walk by, will this have made a marriage take place??? I am really afraid that my nikah is done, this was a long time ago, like 4 years and now my parents are actually looking for me to get married. 

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
Sister in Islam,
The concept of bf or gf is alien to Islam. Islam does not permit a male and female to entertain any type of relationship outside marriage even if it may be merely strolling in the park. In order for a marriage to take place, the proposal and acceptance by the boy and girl must be witnessed by two males or one male and two females. Merely hearing the exchange of words as explained in your query does not fulfill the requirement of Shahadah (witnesses). Accordingly you are not married to the person. You should repent and seek forgiveness for the relationship with the boy and make a firm resolution never to be in any type of relationship with any boy out of marriage[1].
 
And Allah Ta’āla Knows Best
Immad Ibn Arshad
Student Darul Iftaa
California, USA
Checked and Approved by,
Mufti Ebrahim Desai.
www.daruliftaa.net