learn to sing and dance

There are times when I hear someone sing or I watch someone dance and it takes everything inside of me not to cry. I can pull off dancing, so it doesn’t bother me in the way singing does. I tear up in jealousy. There is such a strong desire in me to sing… but I’m terrified to sing in front of people. It might all be psychological… but I really think I suck, and I’m too embarrassed to do it anyway. But I love it, and it tears me apart that I cant.