I need more friends to motivate me and congratulate me.

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Hi everyone. For the past couple months I have stopped playing a sport and it has caused me to gain a total of 19 pounds:/ does anyone have any advice on how to get motivated again. In about a month I am going on a vacation with my boyfriend and his family and dont wont to feel embarrassed about my chunkyness. I am currently 164. In january I was 148. I would definitely like to get make to 148 if not all the way to down to 140. I just need motivation and friends to help get me there.