OP, it's a completely natural and normal reaction - I used to message him all the time, wanting to speak with him or hear from him, even if all he did was tell me to F Off and to "leave him
. but eventually (no set timescale, I can't remember because it's now all a blurry, sad, awful mess that my brain has thankfully erased) I text him less, I focused on DD, my friends rallied round and supported me, including staying overnight with me so I felt safe, secure and cared for... and I realised that he didn't give a shit because if he did he wouldn't have ever treated me like that in the first place for years, let alone walk out on me after making me completely dependent!
Think about what you really want - post it here if you need to...for me, it was :
A stable and nice environment for DD, not one with shouting, swearing, violence, and her seeing me begging him to forgive me (done nothing wrong but the easiest way to get him onside and come back to me)/ don't leave me/ I love you bullshit. Thankfully she doesn't remember any of this crap now.
All I wanted was to be told "I love you" and be hugged. I was so desperate for that I was willing to put myself in harms way just for his validation. Looking back now, I'm appalled at myself for behaving like that and putting myself through such bollocks, all so that wanker could "reward" me. Now I'm hugged and loved all the time because I AM genuinely loved by my DH.
I was lonely when he wasn't there (which was most of the time) but then I felt lonely deep down when he was because I felt trapped by him. I could never be myself. Christ, I'm surprised I was even allowed friends or to go out the house! But that was part of tricking everyone else into thinking he was a "good guy".
Now I revel in my own company (DH is away for his job a lot during the summer) because it's better than being with a shower of shite who had no regard for me or my thoughts and feelings, or our DD come to think of it.
You need support and distraction - use MN as a sounding board, focus on DD and also on yourself. Get mates over to keep you company in the evenings or go to theirs for a brew ..you will get through this lovely, you will. It's all about finding the strength, and you will.