What should I do? & What does it mean?

I have been with my boyfriend for over 2 years now and I’m not happy. He treats me bad. And I can’t seem to find anymore faith in him anymore. He always brakes his promises with me, and lies. I can’t trust him and he doesn’t trust me. I have been unhappy for way too long now. And I have given him too many second chances to change and to treat me better. But he always brakes them like it’s nothing and expects me to give more chances, and I always fall for it. I want a new life. I really don’t want to live this life for ever. I always try to believe he will change for me, to treat me better. But he always fails. And when he treats me bad and doesn’t let me live the life I wish I could, I feel depressed and low. He’s really controlling, and always accuses me of cheating when I don’t. I would like a new relationship with someone else who will be better to me. When my boyfriend tells me he loves me so much, it’s hard to believe him with the way he treats me and how he lies all the time.. I feel like there isnt any more sparks in this relationship. The only I love about this relationship is how close we are and how I can just be me and not worry about what he thinks of me.. I’m afraid noone will except me for who I am like my boyfriend does.. I have very low self esteem I dont think I can do better, but god do I wish. Recently I met a guy who seems like a very good person. He’s sweet, and very cute :) And I have been talking to him secretly over the net. I would like to get to know him more and see if I can do better or be excepted for who I am. Me wanting to get know this guy, do I really love my boyfriend? Wanting to get away from him and starting from scratch.. But scared to not be excepted like the way my boyfriend does to me? I’m only 16 and I know it sounds silly but I am actually scared to be alone for the rest of my life… :’( I have sacrificed so much for him, even my friends, I dont have any friends anymore. Please someone give my professional advice or atleast someone who has been through the same, I know most of oyu will say dump him but, it’s easier said then done.. thank you.