HELP I NEED YOUR TIPS

Honestly everytime I give my boyfriend a blowjob I always feel like i’m failing at it. I also feel like he is forcing to moan and show me that i am doing good at it. We’ve already talked about it. Basically he said that it’s hard for him to cum because he needs more “liquid” if you know what i mean. I just feel horrible for not being able to get him to finish. So whatever tips and tricks you have please share with me.