Begining a committed relationship is a serious undertaking. First be sure you are ready and willing to commit and stay that way. When you find someone you "click" with get to know her likes and dislikes. Her views and money, politics, religion, family, career, marriage and children need to be agreement with what you are willing to accept even if they don't agree 100%. (nobody agrees 100% get used to it). After that communicate, communicate, commmunicate. Getting to know someone is an adventure, enjoy these days, you will cherish them the rest of your lives. Let her know she is important to you. Listen to her. Pay attention to what she is passionate about.
Most important of all is to make the relationship the center of your attention. End all other relationships. You don't have to be hurtful doing it but you MUST do it. Just be honest and let everyone know you have found someone special. If it is meant to be things will fall in place. Then it's up to you to keep it that way. Relationships require your participation at the begining and from then on. You will need to compromise along the way but always remember she is compromising too.
Good luck hope you find true happiness. I have