This sounds counterintuitive, but I've found that one of the best ways to increase your sex drive is to have more sex
. Yes, you have to make extra effort at first, and it may seem a bit forced, but after a few times, you're in that frame of mind more often. When you have recent reminders of how enjoyable it is, you subconsciously think, "That was hot, I totally want to do that again." I'm not sure if this is common, or if it's just me, but I'd recommend giving this approach a try.
I got turned off of initiating for awhile, because my bf was on medication that drastically lowered his sex drive. Every time I tried to initiate, I got shot down, so I stopped trying for awhile. But he wasn't initiating either, for obvious reasons, so then I thought, "Well, one of us has to!" One thing that sort of helped was that early on in the day/evening, I'd kiss him and directly tell him, "I want to have sex with you later." Then we'd go out with our friends, or watch a movie, or whatever, and then try afterwards. He knew what to expect, so he didn't feel as put on the spot, or like I was springing anything on him. It still didn't always work out (I'd still get "I'm too tired" or "I'm just not in the mood right now" sometimes), but it did have a higher success rate.
Good luck to you! Hope some of this helps.