Hey Lucie,
Don’t be sad. The way you are talking about Stephan seems that he loves you too. But i think its high time for you to move on. If you are feeling suffocated in your present relationship let it go. Maybe this guy Stephan is hesitating to confess his feelings to you due to the fact that you are already taken. So chill give Stephan some time and meanwhile you talk to your fiance if you think that is not going to work between you both. 🙂