Hi... Yes you need to handle the situation very carefully. If it is not handled diligently and empathetically then all the three might go into depression. First most important person in your life is you. So ask yourself " what I want " , " what I need " ,  "How I can be happy", " what makes me happy". Often times we confuse when we have given equally good options. Time and clarity in mind puts the right solution in front of you. According to your nature and answers that you will be getting from your questions you will get your partner. No one walks along with us till our death due to numerous reasons. As time comes slowly and gradually people drop when they find their own path. When they are out of your path you are not going to loose anything. The fear of loosing someone and hurting someone makes you feel unhappy and depresses. Just keep walking without any fear and apprehensions. Don't be too hurry...  if you need still need more clarity I am happy to listen to you. Good luck