I don't presume to know JLo and the inner workings of her relationships/mind, but here are my thoughts based on what I've seen. She reminds me of Elizabeth Taylor. Some women just need to BE in love and have that feeling of euphoria of the "this time might be it." I watched E.T.'s bio after she died (RIP), and she basically admitted to this. JLO has been married three times: Ojani Something, Chris Something (the backup dancer), and Marc Anthony. She's been engaged twice: Sean P. Diddy Coombs and Ben Affleck. From my understanding, she met Marc Anthony quite early on, even possibly before Ojani, but the timing was never right. Even when she was dating Sean, he was floating in the background.
I thought she found something solid in M.A., but apparently not. I think in Hollywood, reality isn't our sense of reality. No one is really themselves. There are expectations that put stress on already fragile marriages and egos. Many of these celebrity couples rarely see each other and barely know each other as a result. In all honesty, I bet they would benefit from counseling before marriage, but they simply get caught up in the hype. Everything is bigger, more dramatic, more this, more that. It finally becomes like a movie in itself and they get tired of playing the parts.
Marriage takes work. It takes commitment, effort, devotion, and a solid sense of stick-to-it-tiveness. When trouble hits, you fight to keep your marriage. You make marriage your priority. Not your career, not your fame. In the celebrity world, divorces are a quick fixes for just not wanting to deal with imperfections and facing difficulties. From what I've seen of her life, I've noticed a subtle pattern. If her career is on the rise, her relationships tend to evaporate. For example, after marrying Ojani, her career began to take off. She began to see Sean, as it was good business sense. As a result, her marriage ended. She rode the Sean train until she realized his life was a bit more chaotic than her burgeoning career could stand. Exit Sean, enter Chris, the dependable stable backup dancer. She's a musician, she travels with him, naturally they hit it off and her career continues to rise. However, Chris wasn't famous enough, and likely couldn't deal with the pressure of being Mr. JLo. Also, she wanted to become more known as a serious actress. Exit Chris, enter Ben, Hollywood's fave leading man. She rode that train for awhile until her career suffered a hit with Gigli. Plus, I think Ben is far too simple a guy for someone like JLo.
Exit Ben, enter Marc Anthony again. Despite his marriage to Dayanara Torres, they begin a relationship. If you notice, she's very quiet about this relationship and they are going along swimmingly. They have kids, her career is not a priority, publicity concerning them is pretty quiet. They make their movies together, raise their family, basically under the radar chill. Now that she's trying to restart her music career, and her fledgling acting one with that ridic in-vitro flick, she's back in the public eye. With her spot on American Idol, and being on the charts, the marriage all of a sudden starts to crumble. What's my point? I think she has a hard time balancing career and relationships. I think she loves M.A. very much, but she loves attention even more. THAT'S my hypothesis for why she keeps getting married. She loves the feeling of being in love, but she's utterly unprepared for the rigors of maintaining a marriage.