Premature ejaculation

So I’ve come to the conclusion that my boyfriend has premature ejaculation. The first time I touched his penis he came in literally 3 seconds. Long story short we had vaginal intercourse sex for the first time in the 2 years we’ve been together. I wasn’t bad, even though I did orgasm with him inside me. Yet he keeps “cuming” early in to our sex acts. And it’s really frustrating to the point where I feel like I’ve lost sex interest. We really love each other so breaking up for that detail for me is out of the question. Yet I feel like it’s pulling a tag on our relationship.

Help I need your advice, I have nobody to talk to. We are both in our 20’s so I feel like this shouldn’t happen.

I would feel very selfish talking to him about it cause I know to topic could hurt him. 😭😭😭😭