Questions: Relationships

We've been together for a while. He has a very hard time opening up, emotionally. I've told him I love him, but he hasn't been able to say it back. I feel like his "you are a sweetheart" response to something I've said that's a little too "heavy" in the love-emotion-area is him basically telling me he doesn't feel the same way and never will, and that he wants me to shut up. I'm really just not getting a very positive vibe from his statement at all, but I'm wondering if maybe I'm wrong? Maybe "you are a sweetheart" is actually a good thing?

I’m used to dealing with stupid people in customer service but it doesn’t happen often & has been for the past week. Last week, I went to an ice cream shop, order at drive through & when the guy hands me my cup he says “we usually pile on the toppings but this ice cream had a lot of toppings”. I just look at him & grab it, he says have a good day and I drive off. It just irked me it’s like mind your business. Second one was this past week at a pollo tropical drive through, order at speaker then go to window & ask him for a sauce. He looks at me & goes “you’re making me do more work”. And I said “excuse me?” I knew I heard right but he was kind of mumbling then he repeats it again & says “ that’s making me do more work no I’m just kidding”. And I said “excuse that’s very rude remember I’m a customer I’m not your friend”. And he apologizes, I grabbed the food from him, make sure it looks right & then he hands the sauce. I then say “I’m going to your manager” & drive off. Last one was Friday at a GameStop, I’ve dealt with this specific guy before & he was pretty accommodating the last time but Friday he irked me. I call in & ask if a new game that released that day was in stock. He says there’s plenty in stock & I go to pick it up. He asked if I pre ordered and said no I called in right before coming in to see if there was any. He goes on about how he’s shocked there’s so many copies in stock for the console I was asking for. Asked if I wanted to pre order future games, said no & he suggested pre ordering to ensure I will get a new game on release day. I said I called in anyway to see if you all had it before coming in & wasting my time he said pre ordering would save me having to call in. I reiterated I’m familiar with the pre order process.