If you always compare yourself to others you're always going to wind up feeling bad. Even if you're a supermodel you're going to think someone else looks better. Not necessarily because they do, but because we all seem to be far more critical of ourselves than of other people.
I'm getting close to my goal weight. Theoretically this is when I should be feeling better about my looks. Instead I'm finding new things to be critical about. When I was significantly overweight any self-doubt could be categorised under the great big general issue of 'fat'. I convinced myself that if I lost the weight my face would look better, my arse would look better, my figure would be more in proportion, my arms would be thinner, I'd be far prettier and happier, and so forth. Now that I've lost a lot of weight instead of blaming my fat for my dissatisfaction I'm finding other features to hate: my face is still too round, my legs are still too thick, my upper arms are never going to be slender enough, etc. I could get depressed that I'll never be 'perfect' but the truth is there's nothing wrong with my body. It's my mind that's causing me so much hurt! I need to find a way to appreciate my natural looks. Maybe you need to do the same. Visualisation and meditation could help. Positive affirmations are always good too.
My advice? Buy a sexy nightie now. Don't wait until you get to goal. It's still going to be sexy if it's a bit loose so it won't go to waste. And you can always buy a new one. If you have a significant other I can tell you they'll appreciate the sexy lingerie no matter what your weight! Waiting until you get to goal is punishing them as well as you if you think about it! You shouldn't have to wait until you're a certain weight to feel sexy. Start working on feeling good about yourself now and you'll feel a million times better when you get to goal weight than you would otherwise. I constantly hear about women who lose weight but still feel like the fat person they were beforehand. Unless you change your mental image of yourself you're never going to feel happy or sexy no matter what your weight is.
By the way, your degree sounds really interesting. You must be learning heaps to help you with your exercise and weight-loss goals! I know who to come to for exercise advice from now on.