Not Returned

Have you ever loved someone and they didn't love you back? You wait for their text all day and respond as soon as it comes in? You go the extra mile just to show them you care? All you can do is think about them? And deep down you know they just really not that into you? How do you cope? How do you move on? Did you ever really get over it? If they came back into your life would you drop everything? please help me..I'm love sick. I feel like I'm slipping into depression and I'm 12 weeks with his child. I don't want to stress my baby but I cry every night, everyday. And when he ready to see me I come running like a little puppy. Pathetic.