I accepted an arrange marriage proposal but after sometime his parents did 3 istikhara they are negative.. what to now? we really like each other now

His parents sent his propsal to my parents ..it's completely arranged ..but after getting to know each other we really fell in love.His parents got insecure as he earns really well and spends all on them so they don't want him attached to anyone else..They keep finding ways to end this arrangement..now they did 3 istikhara that came negative..it is necessary to follow them.