I love you, you hurt me

Why I can't make a long relationship? I always failed about it. Actually I'm sad, especially for my last ex, mcs. He already hurt me. I didn't realize it, I loved him, but he lying. Now, he already get a new girl. I hope they will be have a good relationship more than me and everlasting :'). Yeaah, I will and I must forget him, maybe erase him from my mind. I have to moving on!!!