Psychologically Depressed. Of losing.

I cant understand how to show up this problem. I am dealing with my mental health issue. I feel left alone . None of are my friends who support me at this time . Some time i am such lonely i have a heartbreak but it was past 2 years. I still get lonely thinking about it . And at the same time i feel protective towards friends and family. I react in such a way people get irritated due to my possessive nature . And this keep them to avoid me. At this situation i feel like i am left alone. I have not even interacted to my family because i dont want to dispoint them .so i avoid taking to them too. I keep myself busy but still it hit me up. Some times i cant understand myself and infact its like why is it happening. I don't know who to deal with situation. I have a close friend who interact with me but i feel so protective i dont know i get into her nerves. Why is it happening when ever they hangout with others i feel avoided and it kills. Please help me how to over come the fear of losing.