Should I be worried?

My boyfriend and I usually have sex quite often. He travels for work and is gone most of the time so when he gets home we’re usually all over each other. This time has been so different we’ve barely had sex. I asked him if anything was wrong and he said “no” so I tried backing off and giving him space. Even with giving him space we didn’t initiate anything and I’ve tried initiating it a couple of times only to be shot down with “don’t even try I’m not interested”. I again gave him space. He spent an entire week with his friends and I didn’t complain or say anything about not seeing him. After the week was up he asked to see me so I was excited I got all dressed up, shaved my legs and made sure I looked good for him. Still nothing. I made a few jokes about how we haven’t had sex and he ignored it so I stopped. He came over last night and sat on his phone so I didn’t say anything I just let him relax. He then started to initiate it a little bit so I got excited (this time was different though he didn’t kiss me or do anything he normally does). I gave him head and after a while I asked if we could have sex but he wanted me to keep doing what I was doing. He finished then laid back down and got on his phone. I’ve chalked it up to him being stressed or having other things on his mind, but I can’t help but feel unwanted. I know it’s normal for couples to go through dry spells I just feel like this is so abnormal for us and I don’t know what to do. I feel so embarrassed that my boyfriend doesn’t want to have sex with me and he’s leaving work work tonight so I won’t see him for a couple months.. Has anyone gone through a similar situation?