<p>You have phrased the issue as “studying engineering while in a relationship” but the issue isn’t the studying it’s the relationship. I guarantee you that if you stay in that relationship the problem will change over time from “studying” to something else that’s part of your life or your work, e.g., work travel, late hours on a project, vacation ideas that differ from her ideas etc etc etc.</p>
<p>The good thing about your relationship is that it is still on a trial basis. IMO you don’t handle this type of conflict you evaluate (without rose tinted glasses) your girlfriend’s personality (perhaps controlling) and decide whether you want to face this stress again and again for the rest of your life. A bleak outlook for sure but it’s better to face the cold hard truth.</p>