20 years old and already unhappy in life

I will just start by saying, i am so grateful to be alive and healthy and I know there’s always someone worse off but I’m just so unhappy and I don’t know how to control it. I work to live and weekends I’m always stuck inside i just want to cry. So from the age of 17 I’ve had to live alone, i am 20 now nearly 21 I’ve always had to pay my bills and pay rent and never have any help and I have to use the rest to buy food and medication and important stuff if I need it ect .. my family are not bothered as half live in another country and the other half here have drinking issues and I get no support of anyone. I have a great boyfriend which is a positive in my life but I can never afford anything. I’m talking I can’t even a afford a pair of shoes when mine brake or clothes for the summer.

All my friends are out and having fun and my boyfriend does see me a lot but he’s also got loads of friends and money and always out doing something and I just feel like shit.

I’ve even moved into shared accommodation now to make it cheaper and I had to give my pet up, the one thing that made my life worth it. And I feel so upset, feel like I should be enjoying my life young. I’m trying to juggle full time work, run a house and bills and keep in shape and healthy and I’ve had enough. I work my Ass off to just be inside on my days of crying. I’ve just got my self out of debt after falling behind on bills, and doing really well on the line that I never fall behind on payments or anything and I am getting back on track but no one can see how much I go through and achieve. And I feel so alone and heart broken, I miss out on everything and wasting my life away. Does anyone know how I could help my self and feel better. As I said I know there’s worse off people but I still can’t help but feel devastated.