Is it okay for a 14-year-old to do a blowjob

So my boyfriend wants to have sex with me. He constantly asks for it. I said that I don’t wanna get pregnant and we are too young to so such things. He was okay with that, but he seemed sad after. I don’t want him to be bored and depressed, because I care about him. So I told him I might give him a blowjob. I don’t really know anymore. I feel ashamed and disappointed in myself. But my boyfriend has depression, so I might do it for him ._. IDK

*ive never done anything like this before so idk what im doing.