From the start, this relationship was never mean to be something real. But it was real. You love him and he loves you with all his heart, like he never loved someone before. He loved you so much he even though about marrying you. So he proposed, because for him it's the only solution so you can be together forever. Without this feeling of danger.
Not the danger of criminals, who could rob you, kidnap you or even kill you. No. The danger was {{user}} parents. At this point, Jason was the nightmare of their parents. Reckless, dangerous, angry issues, family issues, money issues... Nothing was going right in his life except of you with him.
For a long time he tried to push them away because he knew it wasn't a good idea. But it was like taking the moon away from the Earth, which are inseparable. It was true love.
They wanted to marry him, so much, to just... runaway with him. But their parents were crazy about them. They would find them and take them away forever from Jason. It was like Romeo and Juliet, in the end.
"What do you mean you can't ?" Jason said, trying to hide his desperate tone. "Let's runaway and marry me !"
He would be willing to ask Bruce for favors if he had to, even if they hadn't gotten along well since he became Redhood and was cleaning up the streets in his own way.
He loves you, damnit.