Newbie Here!

I'm new here and could really use some encouragement! I've always been "big" even when I was skinny.... I guess thickness runs in the family... but I've never been uncomfortable in my own skin. I actually lost 10lbs a while back helping a friend who was trying to lose weight... but when she reached her goal she stopped and that was all she wrote for me. Recently my boyfriend has made some really crappy comments about my weight to the point that now I kinda hate my body.... I started trying to lose weight because of him, but after a few days of eating better and working out I really feel better and want to stick with it. He offers no support or motivation so I'm needing a few people to step up and fill in where he won't. I'm trying to lose 45lbs... not an easy task on your own!