Advice needed for relationship and life

Okay, So I'm 17M preparing for the EJU ( long story short japan ka JEE ) and JEE, for context I'm pretty good in academics always 1st-2nd in my batch and under top 5 in coaching. Thing is I liked a girl for the past 6 months, we became good friends and I confessed to her this month on 2nd Jan, she happened to like me as well, So we are dating rn. She is also above avg in academics, does well. Thing is I feel I've been spending way too much time with her and I can't stop myself, I'm obsessed with her, I always wanna be around her talking to her, you get me right ?. And because of this I'm literally ruining my sleep schedule, Not focusing on academics, not even studying japanese, like I used to do it daily, now once or twice a week. Even My mom was saying ki you are wasting way too much time, you're gonna mess up your career, even my girlfriend said don't you think we are spending too much time together, And now it's not like we don't wanna spend time together but you know ( TOO MUCH OF ANYTHING IS BAD ). I like spend 3-4hrs daily in her home, like mai jaata hun wahan padhne ke liye but, padhai hoti bas 1hr uske baad we just talk and etc etc.
This is a pretty serious relationship btw not casual by any means, Ik you'll say 1 month mai kya serious but, She is the right one, My family approves of her, Her family approves of me, But yeah my mom advises me this is not the right time to date, you be close with her but don't mess up your career, I don't know how to deal with this. Like I tried reducing the time I spend with her yesterday and man My day yesterday went so bad, It was torture and by evening I was low on energy, sort of sad. Please experienced couples Advice me on how do I deal with my addiction towards her. It would mean a lot, Thanks !