Am I allowed to throw my two cents in here?
What you ask is an interesting question. The first thing that came to mind was the classic (or is it stereotypical?) case of a woman who marries a man and expects to change him. For instance, maybe the guy goes out every weekend night with the boys to bars or whatever. Maybe the woman falls in love with the guy, and expects that once they get married--and certainly once they have kids--the guy will settle down and stay at home. But maybe that never happens. (Of course, it could just as easily be a man who falls in love with a woman who is always going out with the girls partying). Generally, I think it's a bad idea to get into a serious relationship in those kind of cases. Sure, people can change. But if it's important to you, I think you should make sure that people change before
you commit to them (whether by engagement, marriage, or whatever). So, I think we are in agreement on that point.
As far as converting them, well if they are interested, I don't see any problem sharing with them. Of course, you might be taking the chance of spoiling their opinion if you come on too strong. For example, if you have a bad falling out with them, they might associate your religion with you, and avoid Orthodoxy in the future. Not a good reason, true, but that doesn't mean that people wouldn't do that. Whether it's responsible or justified, the fact is that people sometimes do
judge religions according to what the adherents are like. I would think that the degree to which this will be a problem is probably directly related to how pushy you were about your chosen religion. So... I would the safest course might be to become an educator, rather than an evangelist. And the student should be the one that guides the learning process.