Entering into your first truly committed relationship full of respect and love is a growth process. Some couples grow up together, but others discover more of themselves and begin to deeply understand what they need (and don't need) in a relationship. However, without really giving 100% of yourself to a relationship, which for me includes sex, I don't think its possible to know if you're truly compatible. If this relationship requires marriage, then won't many end in unhappiness, infidelity and/or divorce?