Hey everyone, I'm new here and just hoping I'd get some good advice of what to do.
I'm currently in a very intimate relationship with my girlfriend for over 6 months now. We both are 18 going 19 and in college. She's Chinese and I'm English (Her mom could only speak Chinese which is hard). There is a possibility my girlfriend will either study abroad to another country or just another state close by after completing her A-Levels. As for me I'm studying locally (Petroleum Engineering) as I'm of foreign descent and I won't pay so much more extra just for the sake of studying abroad.
As time went by, my girlfriend would come over my house from time to time and being the naive teenagers we are, we have a monogamous protected sexual relationship (Neither of us forced it, it just happened). Ever since I started college I've picked up bad habits like drinking, smoking and clubbing. With the aid of her, I managed to quit the habits to make her happy. We really love each other so much and I'm planning to work really hard for her because I want to get married to her (I know, may be too young to decide yet, but I'm positive about this.)
Now the bad part of this relationship is her parents doesn't really like me all because I made one big mistake. I went over to her house with my parents acknowledgement to help her out with her stuffs which was already pretty late, around 10 PM. After helping her out we decided to watch a movie in the living room along with her sisters awake too and we didn't realize the time flew by all the way to almost 3 AM! So I headed home. This was a few months ago. Just recently her dad brought this up and deemed me as an undisciplined boy and isn't up to his likings. Because of this her dad doesn't feel comfortable of her being around me anymore. I feel extremely bad and guilty about this knowing that his daughter has already been very far in this relationship without his knowing (My parents already know about my relationship and how close we were.)
I know of my wrongdoings and I texted her father an apology, telling him I'll take it as a lesson and I'm truly sorry about it. I don't know if I should approach him because he doesn't like me, I might give it time. Now I know it isn't right what we've done behind her fathers back, we didn't really cared what was going around, we just wanted to be together. I'm a very confident and knowledgeable man, I do little jobs to get gifts for my girlfriend, and I worked so hard for this relationship. I don't know what is the right thing to do now and all I need is some help and advice of what to do. I really love her and I wouldn't wish for us being apart to happen. Please help me out here!