If you are questioning your relationship, it is important to note that not all relationships were meant to last. Some can be viewed as growth experiences for both partners, and are best brought to their natural conclusion. Even if it is true love, it might not always conquer all.
To give your love the best chance for success, however, always remember to make loving choices. Every relationship hits bumps along the way, and actively working together is the best way to get through them. Trust yourself and your partner, and seek outside help if needed.