Boyfriend doesnt wanna have sex

So i’ve been with my boyfriend for 6 months now and we’ve never had sex. We try and try but it never works, what i mean by that is his dick will be hard then get soft within 15 seconds. So 2 months or so ago we just stopped trying now all he wants is for me to suck his dick which is annoying. I always bring up how i wanna have sex and he says he does to but doesnt even touch me or attempt im always making the first moves im just fed up and at this point i dont know what to do anymore ,ANY advice ladies?