Yes, I hear you. It's hard not to be...."jealous" for want of better words. And I don't have any magic words to take away the pain, but you'll make new friends cazz in the future, and counselling will help you to cope with your thoughts and feelings. After about 12/18 months of going to the Buddhist centre, a young woman (L) came up to me (we'd spoken a few times before), and said "I was hoping we could be friends"? No one had ever said that to me before! Ever!
She was beautiful and intelligent and we started hanging out. Going out for coffee and meals, chatting and getting to know each other. I started developing feelings for her but deep down I knew being romantically involved would probably ruin things. Being best friends would last forever. And that's what we are now. Best friends. I learnt that that's more important. I do love her and respect her but as a friend. And she's talked to me about people she's dated and been in relationships with but I don't get jealous anymore.