Remember also that if you get attached to something, be it an outcome to a situation or a person, if this doesn't work out for you it will create suffering in your life. How much depends on the degree of importance you have placed on this.
By no means hold back in your life, but don't be attached to the outcome of anything. Of course with a relationship there is always a degree of attachment but take things slowly until you are sure that you know the person and that you both wish to go to a higher level.
Never rely on the other person for your own happiness and remember to maintain your individuality. This will keep things interesting and allow you both to grow stronger both by yourselves and as a team.
Best wishes