You should investigate whether he is not being loving or interested, or if he’s just not doing that in the way that you expect or are used to. You may have unspoken expectations or fantasies of what a relationship should look like, and your projections are getting in the way of appreciating the good relationship you actually have. It sounds like you might have different love languages as well, where you need a lot of verbal affirmation and maybe that’s not his strong suit. That is something you can discuss with him and ask for more of. You can tell him what’s working for you and what’s not, or that you’re unsure whether he’s into you romantically despite all the evidence, and try to hear and understand where he is coming from.
See the world from your partner’s eyes. Too often, couples get caught up in their own emotions and neglect to see why their partner is upset. This is the easiest way to drag arguments out for days and days, but it can be easily remedied. Pause for a moment and think about why your partner is upset. What sorts of mistakes have you made that might bother them?
The rule here is that process always trumps content. When emotions heat up, the problem in the room is the emotions, not whatever you are arguing about. Unfortunately, when emotions kick in, we’re tempted to ramp up the content as a way of dealing with emotions – you want to get the other person to understand, damn it, and you’re likely tempted to fight to the death to make your point. Anything you say is like throwing gasoline on a fire – it's likely to be misheard, misinterpreted.