Insecure because of my ex?!

I've been in a new relationship for 5 months now and have been broken up from my 2 year relationship for about 6 1/2 months. Well lately I've been feeling really insecure about myself, likely I don't feel pretty or good enough at all. My ex said a lot of mean full things when we broke up but as did I. But what he said has just been stuck in my head ever since. I try so hard to make myself feel pretty but it doesn't work! I do my hair and makeup I dress cute and I still feel ugly. I've been wanting to get my hair, nails and eye brows done to see if it'll help but I have no money to do this. It honestly sucks. My boyfriend is amazing and he tells me all the time how beautiful I am and I make it seem like I believe him but I just don't. It's not his fault at all and I don't want him to know I feel this way about myself because I know he'll feel like he's not doing enough when he is it's just I was madly in love with my ex and the things he said hurt and I can never forget them....😔