Depressed alot. Feel so alone, mss her!

You mentioned that you are in 2nd year of MBBS and for the last 2 years grades are deteriorating. Possibilities that your study methodology has changed. You now have to work on your own, lots of referring,  spend more quality time etc.  Seek help from your lecturers and/or seniors to understand and adopt proper and compatible study methodology. The second challenge is having crush which is distraction from your academic performance, you do a self-assessment what is your priority now. Being friendly is not bad, instead of messaging, meet and talk to your friend and explain that you are only a friend and clear any misunderstanding. MBBS is real had work and focus if you really want to be a successful doctor, not worth messing with your own life in addition to be a cause of concern to your family. Distractions and lack of determination could be the reason of not able to complete your novel writing.