He was my bf for 7months but on 1aug he broke up he say he had a girlf from past1&half year i want him back hp

we have meet 1time in a marriage on dec 13 and on 14 there was a marriage of my cousin and he is the cousin brother of my bhabhi.even my bhabhi knew this that i m the girl f of his cousin brother she was supporting our relation .i and my boy f use to talk every day in starting i use to call him every now and then .he is from gujarat and i m from mumbai he had also visiyed to mumbai yo meet me with his childhood friend he had taken my interview he had selected me..even he had sent me a mobile phone of relience every thing was normal but yes he use to ask me to marry him i said u first send a proposal for me he said i just want to runaway and marry u as i will be 18-20 he will take me to gujarat at his place so now he had broke off with me but i cant leave without him i have done every possible way to save my relation i have even asked him why is he doing like this to me i think bec of my friend i use to talk about him so is he insecure about me pls give me some solution to ger him back