Will this marriage work?

Please give me honest answers. A woman has been with a man for 3 years, the relationship was great, they loved each other so much, thought they would spend the rest of their lives together. However, the guy hurt the woman MANY TIMES with false promises of marriage. He said they would get married, then he got scared and postponed it. She felt so bad bcs. of this, but accepted him bcs. she loved him and knew he loved her. After 3 years and false promises she decided she didnt want to feel rejected like this again and risk "wasting" her life waiting for him so she dumped him. She goes out with a guy from her past, he immediatley asks her to marry him, he promises her a house, an immediate marriage, something she waited for so long with her ex. She accepts and gets married 4 months later, however, in her heart she knows she loves her ex more than her husband, and only got married, bcs. she didnt want to wait around any longer. Will this marriage last and be happy?