His ex wasn't on hormones, so it doesn't seem like he has any real world knowledge/experience about the effects of HRT. I started my transition in 1998, and I know a lot of 20 something and older trans women, and it usually takes a few years for significant changes to occur. Breast growth and changes in skin texture and appearance occur within the first month, but female fat deposits take a few years. There is a reason why body contouring, fat transfer, hip/butt implants, BA, and dangerous silicone injections are so popular in our community (yes, cis women also seek out these treatments, but the number is quite low compared to our community). If you really like your new boyfriend and think that there could be a future with him (is he everything you want in a man?), I would not advise you to end the relationship at this point, because the more he gets to know you, and loves you, he may be less concerned about physical appearance, and also, your body will feminize more; it's just not going to happen overnight, and if you don't get the results you are hoping for, you could consult with a board certified plastic surgeon to discuss your options if that is something you want to pursue for yourself (not for him, or anyone else).
