I feel the need to expantiate on the 9th point of my previous post.
This is not rocket science.
If you close your eyes take a leap and free fall, the laws of physics dictate that at some point you are going to land on the floor, more often than not head-first. When your eyes open and really SEE who is lying beside you, you might not like what you see.
Be wise; know exactly when, where and to whom you give your heart.