You probably need to have protein, reconstructive or hot oil treatments, as your hair is lacking elasticity. You can either buy products (Kerastase products are good) or go to a salon to have treatments done.
Also, if you use heated hair stylers alot, try not to use them regularly. Using a thermal heat product with stylers will help prevent breakage.
The odd hot oil treatment would do it good too and as said above a heat defence spray if you use a hairdryer and other heating products like straighteners regularly.