Senioritis -- help!

College senior here self-diagnosed with Senioritis. I'm a senior at a top-10 school and signed an IB offer a while back. Historically I've been very hard-working, focused in class, and driven to beat my classmates academically. This year though, I feel like I've lost motivation to out perform people and am just coasting by. I procrastinate, do the minimum to get by, play too many video games, spend too much time on social media, go out several nights a week, and just want to spend all my time chilling out with my roommates. I know that I want to work harder but find excuses rather than putting my head down and working. I think this has to do with the comfort that comes from having already signed a job and living with several roommates who are equally lazy. Has anybody had a similar experience and have any advice? Thank you!