Why doesn't my boyfriend react to me wearing lingerie?

Gonna try and be as to the point as possible. I've worn lingerie 3 times in our over 1 and a half year relationship. 1st time, little to no reaction. 2nd time, reaction achieved. Made me feel very sexy and was looking forward to said feeling next time. 3rd time was tonight and got no reaction until I asked if he liked it to which he responsed with "Yeah I like it". Didn't touch me really or say anything otherwise. When he saw me he walked past and behind me to the bed layed down and yawned.

I thought he might be tired so asked if he would rather wait for another night to which he replied no. I felt good until his cues and vibes started making me feel self conscious tbh. It was all short and brief like he just wanted to get it over with. I couldn't help but cry after. I struggle with body dysmorphic disorder and building myself to where I feel okay enough to wear sexy stuff takes a lot.

I've told him in the past after the 1st time that some form of verbal approval is appreciated or even just touching me besides turning me around. After this 3rd, I was honestly pretty crushed. I told him how his lack of reaction made me feel and he said he was nervous when he saw me in it because he knew his performance was going to be poor as he was tired (he had done nothing all day and napped so I was unaware of this).

I'm just at a loss. I feel like he's so unattracted to me at times like these. This isn't the first time it's happened either otherwise I could let it go. But I'm at the point I don't want to try wearing anything sexy anymore. It's not worth feeling the way I do after at this point. Any advice is appreciated.
Why doesn't my boyfriend react to me wearing lingerie?
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