Self Esteem and Confidence Issues

I have severe body image problems. I am slightly overweight and have acne on my chest and back. I also have scars on my arms and legs. Combined, those things make it so uncomfortable for me to reveal myself to any guy. I am falling for this one guy and we have gone as far as me giving him a BJ but I've stopped us from going any further and avoided everything else because I hate my body so much. I wear shirts that come up to just under my neck. Any tips on how to get rid of my acne and scars?? I've already lost 20 lbs from my highest weight.