How do I stop being so co-dependant with my boyfriend?

Hi. I’m starting to really notice how co-dependent I am on my boyfriend. Whenever I’m not at work and he’s busy and not replying I start to stalk his social media and see possible people he’s speaking too. Or if he doesn’t call back most the day I’ll call him to see who he’s with and I’ve just got into a habit of it to the point where I can’t really rest Unless I do this.

I’m pregnant 5 months in with him so obviously being at home all the time drives me a bit insane and I don’t have as much things to do as I usually would. On top of that even before pregnancy I’ve always been like this so it’s kind of enhanced it in a way. How do I stop this I don’t know if it’s normal? I get so wrapped up in my mind about who he’s with, assume he’s with certain instagram follower girls and when I’m not with him I just go a bit crazy.

I think what makes it worse is I don’t actually tell him how I’m feeling and that I’m doing this as I know him, he would find it very weird and toxic which I agree it is, it would cause an argument. He would also say how he’s making money towards our life and the babies which I do know is true. I don’t know what it is because at the moment I don’t even look pregnant and I have no symptoms so I can’t even say it’s the pregnancy causing this, it’s just me as a person. For example today he’s busy at 2pm and he hasn’t called me back since it’s now 7 and I just freak out? He’s very non chalant I don’t even know if to explain how I feel since he would find it odd behaviour.

Updates
11 mo
I also understand my anxiety isn’t his problem it’s all me it’s just gotten worse since the pregnancy and sometimes I feel like he dosent give me enough attention. But I know him and In his eyes he’d find this immature and clingy
How do I stop being so co-dependant with my boyfriend?
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