What do you mean by "coerced?" That word implies use of force or to threaten.

Yes, what do you mean by "after much coercing from me"?

I think any relationship is doomed if coercion is deemed necessary.

Yes I would say the chance of this being a healthy relationship is low. Love trusts and is not jealous. But if the person you're with has been known to want other men on the side then how can you trust her whole heartedly? If you find yourself becoming unhealthily angered, you should seperate yourself from this relationship. Dont let anyone pull negative emotions out of you uncontrollably. Take time apart and regain some sense about this whole thing. Find some positive emotion and balance and either continue as friends if you can handle it, or move on. Anytime we feel out of contol emotionally, we need to take a step back and analyze why. Bad stuff happens when we lose ourselves.

By coerced I meant convincing her or trying to control her. I feel like it's becoming doomed but I don't want it to end. I don't know if I could manage be friends with her after we broke up. Thank you for the input everyone, I really appreciate it. I need to take a step back and figure out what to do from here.

Hi.. I d like to say a few things and I m doing it with good intentions, not bad ones , so bear with me .
At one time in my life I was one of those girls, the one you are dating.

First off, you are an adult, mature man. At 29 I already had 2 children , who I was responsible for , I ran my home business, worked at the hospital and was pursuing my associates degree at the same time. There is no way, no how I would have any interest intellectually in a 19 year old. At that age period, the gap is too wide. So, her sex appeal aside, what is attracting you, a grown man to a girl who is barely out of high school ?
Myself, at 19, I was mature in some ways and really freaking immature in others.
I also picked older men, like you, 7, 10, 12, 18 years older.
At 19 I have been living on my own for 3 years and moved to another country. I had 2 jobs and it all looked good on the outside, I seemed experienced and worldly, but on the inside, I was completely destroyed and f---d up and this is likely the reason why a 19 y o girl is insisting that she must screw everyone in the universe to feel fulfilled.
I know this is why I did it. Having a committed relationship was a problem for me because I suffered significant psychological damage from abuse and rape as a tween and teen. I have just began to deal with my past at 19, but continued to walk down the self destructive, self deprecating path.
This is likely the kind of girl you are with and nothing is going to change her until SHE gets her sh-t together and gets some help. I did it without therapy because I have enough intelligence to take care of myself, but not everyone does.
If you want monogamy, she is not going to give it to you. People say whatever you want to hear, but their actions speak differently. If you had to beg her to not be promiscuous, her word means nothing , because she is going to cheat. She is not OK with her self and the only person who can fix it is herself.
I m sorry. I don't think this is going to end well for you.

Aronia - thank you for the insight. I suspected that she is only telling me what I want to hear. I don't know if she has suffered any psychological trauma but her dad is absent as a father and both parents just give her what she wants. I guess she is used to getting what she wants and will justify it easily. There is no intellectual connection. Most of the stuff that comes out of her mouth annoys me. I don't know why I'm so fixed on making this work. Is it because I'm co dependent? I don't know why I'm attracted to her. She isn't even all that attractive. The sex is meh. I think I'm afraid of being alone? But the idea of her cheating just ruins me. What the hell is wrong with me?

So, if she is mediocre and the sex sucks , she must have something familiar. I ve learned that many times we are attracted to people who remind us of our parents in their dysfunctional ways because it is familiar and comfortable.

I think you are on to something. I just don't know what yet. You have given me lots to think about, though. Thank you for your help! I need to find the connection between her and my mom. My mother and I have a very dysfunctional relationship so I think you are right.

I don't think it matters what her issues are or why she has them, her mother, her father, whatever. I think she's too young and I think you probably desire a relationship, so when the situation presented itself to you, you wanted to make it be something it wasn't. When I was single, I had times where I was casually seeing someone and I would see everyone else around me having serious relationships, and I think I felt like I wanted that too. So I would try to make relationships with people who were clearly not that into me and me not that into them. It's not any deeper or mysterious than that.

Move on from this person. She's not right for you and you're not right for her. That's all it is.