Feel like a loser at home but am dreading going back to uni.

So I'm just doing the bare minimum and crossing my fingers in the hopes I fail this year so I can come home and save some shame.

I'm back for the Christmas holiday, today is the 27th. Before coming back home I was actually enjoying university as my two housemates have become good friends of mine (which is surprising to me as I studied last year at a different uni on a different course which I hated). I don't really enjoy my current course though, and should probably drop out again as I hope to become a sole trader once I'm living back on the Isle of Wight long term again, which is where I was born and raised and where all of my family and friends are. However I am afraid of disappointing my dad as he is so excited that I'm studying engineering. So I'm just doing the bare minimum and crossing my fingers in the hopes I fail this year so I can come home and save some shame. I can't worry about debt or wasting time.
That's the plan anyway. I was looking forward to going back to university after the Christmas holiday at the very beginning, due to my housemates. It's been fun coasting, doing nothing particular, and partying occasionally since September. Now I'm home though, I haven't bothered to get a temporary job as I am good with money and have plenty to live off of from remaining student finance, even after buying Christmas presents. However, doing nothing at home feels different. I feel like a loser, living with 'mummy' at age 19 with no job or girlfriend and borrowing her car. I feel no motivation to get a Christmas job now as there are only two weeks left of the holiday. I have been keeping busy with other projects, mainly gardening, today is just a particularly bad day. So that's home life.
The reason I'm dreading uni is because as before mentioned, the course bores me to death, I feel like I just want to get on with my life now (I have enough money squirreled away to move into a place of my own, and the only real reason I'm at uni is because I didn't know what else to do after Sixth Form) and on top of that, my relationship with one of my housemates has taken a turn while on holiday. Basically I had a crush on her since day one, which I managed to suppress as she was already taken and perhaps dating a housemate could be considered unwise. Despite remaining realistic, she is exceptional at reading people and she knows, which she has only made apparent now we are away. Before leaving we were almost like very close siblings. A few days into the holiday she became quite icey, leaving me on read etc etc. Tonight she made clear that we are just friends in quite a cold, booshy way, which is fine. I took it well and was able to smooth things over, ending the issue with both of us being jovial about it.
However, I can't help but dread going back to Derby now for those three reasons. I suppose the sensible thing to do would be to drop out now, but again, dad is the biggest mental block on that, and my other housemate is also unhappy as she hates her course due to bully classmates. I haven't really factored that into anything yet but my gut feeling is that if I leave, she will too, and yet that housemate actually knows what she wants to do and is motivated if it weren't for her classmates. Not to mention it would also leave the other girl lonely as we have managed to get halls again for next year, all in the same flat.
Thank you for reading all that, I don't expect many to read that novel of self pity in full! Anyway I feel a little better now I've written it and any advice is more than welcome. Thanks again, have a happy new year!