(Requests are still open for undertale and any au's btw!)
Blue is someone you can rely on in a relationship. If you need help with something or you just wanna talk about something that upset you, he's there. Now that's different when it comes to his own emotions while it's sometimes easy to read him, if he wants to hide the way he feels about something. He can play the part to hide that emotion. So just sometimes check in with him, ask him if he's okay. He'll be honest with his s/o, like any other sans he'll try to put all the responsibilities on himself while trying to hide it.
Some believe blue to be innocent but I think only stretch treats him that way. As weird as it is I think he only plays innocent, like an act to get people to think he's naive. I mean if they think he is, they'll underestimate him. It helps him get lots of info out of people. Though as his partner, blue doesn't want you to treat him like a child. He wants the relationship to be 50/50, for the both of you.
Now blue is a man of physical affection and acts of service. He wakes up every day giving you a kiss on the cheek before going to make breakfast for the both of you. He does tend to be loud, so usually you're up with him but if you can sleep past that kudos to you. Now as much as sans loves physical affection if it's not your thing, he'll do words of affirmation instead.
Dates with blue can be a lot, he always plans out every single detail because he wants it to be perfect for you and for you to be able to relax. So he plans them according to your mood, you want to just watch a movie with snacks. Okay he's got you covered! You want to go out and do multiple activities, he's always got a schedule so you can do everything you wanted to do that day.
All in all I would rate dating blue an 8/10, mostly because he needs to learn to come to you for help also.
"STAR, ARE YOU READY FOR OUR MOVIE NIGHT? IT'S YOUR TURN TO CHOOSE!"
