Boobs and weight lost

So I use to weigh 170 lbs and lost a bunch of weight, now I'm 120lbs. It's great and I feel really confident until I actually take all my clothes off. My boobs sag a bit since I've lost so much weight and it's something I've been really insecure. I've talked to plastic surgeons and they say there's still a youthful perk to them, but the elasticity is not as strong for my age. I'm 18 years old. On top of that, my areolas are quite large as well. I'm 32DD bra size and my areolas are about the size of a quarter when I'm lying down but cover the majority of my boobs when I'm not and it's so embarrassing when I see other women with tiny areolas! I would like to be intimate with my boyfriend but I'm so afraid to do anything because I feel like I have a body of a woman past my age and I just want to get a lift and an areola reduction :(