I’m happy to have you here, and so glad you’ve posted, but for future, any questions you have that need answers should be posted on the Q&A forum. So, I’ll answer this here now, but look forward to reading your posts on that forum!
Break ups are never simple, and it’s rare that anyone has feelings that are completely black and white. Your ex-boyfriend still checks your blog because he still has feelings for you. They may be feelings of curiosity. They may be feelings of sentiment. They may be feelings of loss. They may be other feelings or some melange of all of them. So, yes, it does mean something that he checks your blog since your break up with him 3 months ago.
However, that doesn’t mean he wants to get back together with you. Don’t misread his checking your blog for anything more than it is. And don’t take any actions towards him as a result of your realizing he may still care enough to read your blog. Honor the break up and know that everyone grieves, heals and moves on in their own way. Sometimes looking back is just a glance over one’s shoulder. Other times it’s a peak at an ex’s blog.