about partners pre mature ejaculation.

When my bf and i first started dating we would have sex that would last Atleast 30 min to an hour. He was very open and told me that he came quick but could keep going after and well he did for a while. Now he still cums quick but doesn't stay hard after. It started with a max of 5 min and now hes cuming in 10 to 30 seconds. I was very opened with him and let him know that i have an extremely high sex drive for a woman and that i would masterbate Atleast once a day. He didn't have a problem with that either. Now hes cuming so fast that i can't even think about trying to have an orgasam because as soon as hes in hes done. He seems to get offended if i want to masterbate because i didn't get mine but hell how else am i going to get mine!! Weve tried four play which he swears each time will make him last longer but it never works he actually cums quicker with four play, the only advantage is i may get lucky and get off from the four play since i can't get off in 10 seconds of sex. I have researched so much and went to him with my findings of ways to help and he either says really is it all about sex? Well no its not because i love him for many reasons and it sure isn't because Im being sexually satisfied which he should know. He gets very offended by any talk on how to improve his premature ejaculation and i try and assure him that its ok and there are ways to improve and help it but that never seems to.do much good. Its gotten to the point where we were having sex 3 to 7 times a wk to maybe once a wk if Im lucky. Sex is strictly when he wants it and i have no say anymore. It actually reminds me of things you hear about women with the Im tired or not tonite or any other excuse to not have sex. I believe that its caused from embarrassment and his aggravation of not being able to please me due to pre mature ejaculation. He always tells me well.if you wernt so good or so tight etc etc but Im not stupid i know that it has nothing to do with any of that its just his way of lying to try and make me feel better about it but its not working. I don't know what else to do to try and comfort him or anything because its such a touchy subject for him and i don't want to argue about sex. How can i make him realize that my sexual needs are important and that getting off by four play alone is not enough for me? We can't even make love since our sex always ends up as a 10 sec quicky. Not being able to feel the passion and closeness of making love to my partner is taking its toll and has gotten to the point to where i think he likes being able.to be done in 10 sec so he doesn't have to do any of the heart felt passionate love making since our sex used to last longer and now he can't preform after 10 seconds. I know ejaculation is a mind over matter which is why Im beating myself up over his quickness. To me if you could last longer before or.keep going after climax then why can't you now?? Please give me what advice you can as a guy so that i can try and see this from a guys point of view rather then just a womans... I know that women get upset when their men jack off all the time because as women with high sex drives we see it as an insult that you'd be masterbating instead of having sex with us but as a woman with a high sex drive who masterbated daily because i love to orgasam Im in a position where i have to sneak to materbate just to get mine maybe twice a week so that he doesn't get upset because he can't get me off. I don't understand how a man would get offended or upset about that when its because of his pre ejaculation that Im having to masterbate to get off. If it bothers you that bad then actually put forth efforts to help the pre ejaculation so that our sex can last longer.. Is that wrong of me to feel that way?? I know i have alittle of questions and frustrations plz forgive me.