I cast a chart for your question. The chart shows that this could not be in the foreseeable future. It seems that each of you have other plans for future. For him it's important now to try promoting his career and right now he has no intention in formalizing your relationships. You on the other hand, consider starting high studies and there is a good possibility to do it abroad.
The chart shows clearly that there are lots of disputes and misunderstanding between you, and perhaps it worth taking a short break checking your relationships carefully.