Do not fear anyone or hate anyone. By feeling these types of emotions it is going to give you more hurt. The best advice I could possibly give, is form open and honest communication with the person you are wishing to establish a relationship with. Also form open and honest communication with your parents too. Do not be afraid to talk about your feelings with your parents. In fact, that is probably how you wish to raise your own children. The only way that is going to happen is by you (the parent) providing that warm environment for your child to be comfortable enough to reveal or disclose some things to you. I'm sure every parent is dying to have that kind of relationship with their child, especially when they start dating.
Don't let some dis-settlements in relationships keep you from finding the right person that matches your ideals, morals, values, personality style, and the way you envision raising your children. Be confident with who you are and be proud of your upbringing. It has made you who you are and that's very important in constructing an intimate relationship with another person.
Also you mentioned that you were serious with one person for a very long time and talking to new people is very different and difficult for you. Tell the person this. They might be experiencing the same feelings, but someone has to be willing to break the ice. I know you might be worried about your future with finding a life partner and having children, but don't let this worry you. Enjoy your life as it is at this very moment.
If you don't want to see your parents fighting then you need to talk to them so they know you care about them and yourself. It's very important.
You will know when you have found that person to share your life with. I know you may have heard this before, probably plenty of times, but it is true. It is a feeling of experiencing good, healthy boundaries and honest communication with another person who understands you for you! So don't let things discourage you in any way.
