Low Libido

A little background, I grew up in a very religious family where sex was talked about but was not glamorized in any way. As I got older I realized that I don't believe in that religion and I now have a current boyfriend who I love very much and live with. We have sex regularly and at the beginning of our relationship we were like horney teens. Before we started dating and even a few months into us dating (we were long distance) I thought I was asexual because I had no sexual feelings at all. I was confused because my friends all were like "I neeeeeddd to have sex" and I was just like uhh I didn't even think of sex I have so much other things going on. But anyways, I'm not asexual I just kinda figured I was keeping myself busy all the time and was only attracted to my boyfriend so that's why. Let's fast forward to now and I just get REALLY low libido. I used to be able to get wet so easy and now it takes a lot. I don't have any stresses really so I know it's not that. I'm just wondering if anyone has any experience with this and what they found out with their experience. I honestly don't know if I do have low testosterone levels and low libido or if I just need a LOT more warming up. Any advice? Any tips to try and spice things up? ANYTHING PLEASE