really need advice!!

Allie • Mom of 2
So I have been with my boyfriend 5 years  this May we have two beautiful daughter together. (I don't believe in marriage) I love him don't get me wrong but when is love not enough. I know relationships are work and you have to try but when do you stop?? When we first got together we had a lot in comin we were young so we went hung out and played video games whatever. We both work in a restraint and have for a long time. I'm ready to move on I want to go back to college I want to go to med school. And all he talks about is hunting and working on cars which is fine but he doesn't talk about getting a better job or moving up at work he is just content where he is and I want more. But I don't want to support him with a salary job while he is just excuse my French but fucking around.
Hwhen we fist got together we were teenagers we dine drink because we couldn't buy it we live in a small town where the cops went to high school with your parents. Then I got pregnant with my first daughter 6 months before my 21st birthday then after I had he I got pregnant 6 months later. Now I am going to be 24 I'm not pregnant and I'm not breastfeeding so I don't see why I can't enjoy and alcohol beverage or two but for him it's a huge deal and I've have changed. (He doesn't like to drink) but now that I'm legal all of a shudden I've changed. It's not like I'm buying a bottle a day or getting dui's I enjoy a drink after work and go home I don't see a problem in that.
He is also extremely jealous. I have no friends that are not his friends too. And I have absolutely no guy friends. I'm a ton boy I grew up playing football and wrestling my best friends were guys. And when we first got together and he was my world I was willing to let a few friendships go but lately I have been thinking about leaving him and I literally cry over the friendships I sacrificed to be with him. I am a server and (not to talk myself up) but I'm a tall skinny blonde with blue eyes so I get numbers I get asked out a lot and usually I turn them down or throw their number away as soon as they leave but lately I have been thinking what if. Am I terrible for wanting more. I love him but how much of yourself do you sacrifice?? I have friends that are guys but if I talk to them are even make eye contact or accept their friend request or even like their post it is this big friend( I have never cheated on him) or if I have a drink after work or even pick up a 6 pack while I'm grocery shopping it's a huge fight. When he isn't jealous or mad he is wonderful and he is a great dad but I don't feel like myself anymore and I feel like I'm walking on pins and needles idk what to do anymore. My friends say leave but of course they will say that they are my friends. I need to know from others to if leaving is really what's best for me and my daughters. Please give me your options