Boring sex!! Help!

So my boyfriend and I have been dating for about 3 months and we have sex quite a bit, basically 5 days a week. It's been so boring lately, it's the same two positions because that's what we like best and even if we switch positions he always wants to go back to doggie style...I feel like our sex is so boring..how do I spice it up? I've already worn lingerie and we've used a vibrating ring but idk...and he doesn't take the time to do any foreplay anymore...it's like straight into him being naked and then right into sex...what should I do to spice this up? Or is he just boring at sex!!!