HELP!!! PLEASE!!

So I've been with my boyfriend for almost two years, im his first real girlfriend and I also took his virginity. He is still so new at the sex thing even almost two years in. When we have sex it's normally great but it just last for a short amount of time, like 2-5 minutes and he ALWAYS get his nut. These last couple of weeks idk maybe it's the stress of Christmas but our sex life has been horrible. He normally gets me off by eating me out but he tried the other day and it was so bad I had to stop him in the middle. Last night we had sex and it was like a good 2 minutes? Tried again this morning and he went soft during. I normally can masturbate and be fine but I'm going crazy here. I am and have been understanding and talked to him about our sex life plenty of times assuring him that it's okay that he finishes fast but sometimes he doesn't even try to please me, and it's so frustrating. I'm so horny and don't want to masturbate. I need some advice please!!!!!