We don't know enough to properly advise you, only you have the information necessary to come to a view as to whether your life is really at risk.
But I would make the following observations, with the caveat that it is very general and not specific to your individual circumstances:
1. You have to live a life that makes YOU happy, (or at least not desperately miserable), and that is unlikely to involve taking major decisions according to the wishes of your parents.
2. This IS possible in this country, in a way it perhaps wouldn't be in Pakistan (I don't know maybe it would there too?) but it is incredibly difficult. It almost certainly will involve breaking from your family and the community they are so concerned about being "dishonoured" in the eyes of.
3. That is likely to be some time in the future when you are older, more mature, more able to be independent, and have other life opportunities. You are going to have to play a long game and be patient.
4. Don't be defiant. Don't be totally accepting either, see whether there is any possibility of having an independent life with your parents still a part of it, keep your options open.
5. Make contact (secretly) with people who can help you make good decisions with your safety always paramount. That is likely to involve other girls who have gone through this already. Seek them out, online, but be careful. UNDER NO CIRCUMSTANCES LET YOUR FAMILY KNOW THAT YOU ARE DOING THIS. There are support networks for girls in your situation, you are not alone. Make use of the experience and wisdom of others.
6. Don't go to the police. If you ever do at a later stage don't ever expect them to be able to protect you, and be careful that they don't further endanger you.
You face a really difficult few years. I feel for you because you are being exposed to two cultures, the laissez faire western one and that of your ancestral homeland. They aren't compatible in lots of ways. But honour killings are not OK, it is really as simple as that. That culture is deplorable, however much we criticise the weaknesses of the western one.
At the end of the day you may find it easier to go with the flow and your parents may allow you enough freedom to make life tolerable. That may be for the best. Don't underestimate how difficult it will be to break from your family and the drawbacks of choosing that life. Which may involve moving to another town or city, always watching your back when you meet other members of the Pakistani diaspora in that new town, in case word of you gets back to your family. But that will be something only you can decide, at some time in the future.
Until then watch and wait, but be REALLY careful.
Good luck.