I was enjoying this until I stumbled upon the original of Let the Right one in and realized that the US movie totality misunderstood the context and rewrote it as black/white vs many shades of grey.
The US cuts all this down so much it turns Eli (Now Abby) in to a clear groomer who is just your every day base vampire trope and Oska (Now Owen) in to this terrified kid who is not fit to be her guardian but is being slowly pushed in to it. It also turns Eli's guardian in to a creepy pedofile when in the original he's her minder and really cares about her but kind of knows his time is up but accepts it. The problem is they don't love each other and that the love she craves but it is with Oska.
The original also touches on Eli's gender which is a very interesting issue, but the remake turns this in to a little boy being a creep and watching a naked girl where as in the original it clearly shows Eli is a boy but his privates have been mutilated hence he feels its easier to just be a girl and its an interesting issue to touch on because its looking at the idea of gender and sexuality.
So yeah I recommend leaving the US remake and watching the original as that is just a better film overall