Hi and welcome.
I'm glad you're heart is in it, but in all actuality, it's your mind that you are going to need to pull you through this and keep you in it. That is for you, me, and everyone else that's in the same boat. Transitioning from one habit to another is not exactly easy at first, you have to want it bad enough... you must be willing to undergo behavior modification and make the final choice to push yourself. What are you waiting for...20 more pounds? You must know for certain if you have hit your bottom to break the cycle.
You have 45 pounds left to lose, 5 down. So let's simplify it a moment and break it down...think of it like this....I've lost 48.5lbs since Feb... 3 months. Come August/September, if you make your daily diet and exercise goals like some others suggested above for you to commit to, you can lose those 45lbs.
By August/September! You are not that far away from getting where you want to be. If you do not get on track soon, with further delay you may acquire a lot more to lose and you will look back to this day with extreme regret.
Exercising and moving around a bit hurts a lot less than self loathing. We all have days where we do not feel like exercising and analyze our exhaustion and want to give in to it, especially those of us who work or are running after our children all day. When I started exercising again, I only did it for little bits and worked my way up. I kind of had no choice, lol...The first time I went for a walk outside in Feb, I swear, I was back home in 10 minutes on my planned "mile long walk." I was so tired and my calves and back hurt so much, I just couldn't go any further. I was so bummed out and down on myself. I have an elliptical and treadmill at home, but back then, I couldn't even do 90 SECONDS on the elliptical. I worked time up in baby steps. How disappointed I was in myself gave me ammunition.
You enjoy that extra half an hour of sleep, I feel ya there. Now imagine for a moment how much more you will enjoy it if you exercised some the evening before (again, baby steps), knowing that your body is burning fat more fervently while you sleep than if you hadn't even moved around. Also, your chances of not even needing that extra 1/2 hour are greater. Most likely, you will be sleeping better ....and when you do rest, it will be more soundly, resulting in less need for that extra sleep because your energy levels will increase.....and you will have a happier sense of self. I used to love to sleep in til noon on Sat & Sun....the past 2 months, I can't sleep past 8am even if I try to.
There's only one you and you are very valuable, start saying that to yourself every morning in the mirror. Pretend your reflection is your FRIEND telling yourself that out loud....speak it until you speak it with passion, it works, as coo-coo as you may feel doing it. I do it all the time, lol, it keeps me adjusted. Be your own best friend. 45 pounds...in 3-4 months...90'ish short days, you can do it!
Stick around here to gather up strength for your decision on whether you want to live in your body or just exist in it. You're in the right place to make that determination.
Good luck. I hope to see you in the progress pic section soon. Sending oodles of positive energy your way!