What am I suppose to do please help !?

Okay so I've been dating this guy for about 10 months . I love him dearly but I'm having my doubts , he split with his ex fiancee back in 2010 and that's when him and I got together , I mean I've known him for about 8 years . I'm 18 and he's 26 , sure we fight and all but who dosen't you know . Anyways him and his ex have a child together , and I know he tells me he dosen't love her and everything but after being with eachother for 8 years you're not just going to get over them like that you know . He compares me to her all the time , like when I cook he will be like well she never used to cook , and when I clean the same thing , but it's for everything . I mean I adore this man , but this has got to stop , he is starting to treat me like **** a little more everyday and i'm not taking that . When he talks to her on the phone he says stuff like I'll love you forever and no matter what you'll always be mine . I mean I do everything for him , I clean , I cook , I do laundry , I sacraficed my family for him , got kicked out of my house for him , and it's like he dosen't appreciate it , how do I make him understand . Plus he does things that he knows will make me angry , like when we're sitting on the couch , he'll look out the window and arch his eyebrows just so I look and I see him looking at another girl and when I get pissed off he just laughs about it like it's some big joke , like last night I was doing the recycling and I went to the garbage because there was recycling in it , and I had just finished complaining about people putting recycling in the garbage when he throws his chocolate milk container in the garbage right in front of me and then he laughs about it , I mean what do I say to that ? I don't even know what to do about it . Another problem would be that I dated his younger brother way back and now he lives with my boyfriend and I'm starting to have feeling for him again , I mean he helps me clean up and he helps me cook dinner , and he appreciates the things I do around the house unlike my own boyfriend , I don't know how to put those feelings away thought help ? Plus last night I made a huge dinner , like pork chops , sidekicks , and corn , and instead of him eating the nice meal that I slaved over the hot stove to make he goes to McDonalds and eats , when he knew I was cooking supper , I mean that's ignorant . Anyways I'm not sure what to do about any of these situations : the ex fiancee , the lack of caring for my feelings , the ex boyfriends , please someone help because I feel like i'm going to go insane pretty soon . Thank you !