Talk to Psychologist on Behaviour Issues

My son turned 7 in May this year. I am facing an issue regarding his behaviour. General impression about him is that he is very sensitive or “touchy” about things. Generally he communicates well with everyone in the house (maintains eye contact and explains his point clearly). But jaise hi uss ki marzi ke khilaaf kuch hota hai to he starts crying with big tears in his eyes. Aur chup se nahi, full blown crying attack hota hai. If someone else wins a game in school or if his sister wins at home, he will cry. If he wants something and elders say “no”, he will start to cry and argue as well during the crying session. His friends in school have started to call him “cry baby”. Teachers say that he is very emotional and sensitive. He gets angry and shouts as well, but mostly during his crying episode. I’m afraid that he might start to suffer from depression later on if kids around him start making fun of him. I’m going crazy seeing this behaviour myself. Any child psychologists who can help