Proposals are tricky affairs i must admit. You are truly taking a risk on this one, You can never be sure about it. you could either end up as a loser or a winner it's one of the two. Being prepared is key, just be ready for anything, otherwise you could end up getting hurt. It's not a must for a girl to say yes to a proposal. What if i do not want to marry you, what if i feel it's just not the right time to get married,or there is somebody else i am considering to get married too? The person proposing needs to have their facts right and be totally sure that the person they are proposing to is on the same page as they are. But again surprises can come up, having an assurance is not enough proof that they will agree, talk constantly and weigh your conversations, that way you are most likely to know if its going down or not.