Get my Puppy to Like Me :(?

She might just prefer a lady more because even though you are nice to her and do everything a man can sometimes come across as scary because you are the more dominant role. She likes you but prefers your fiancee.

Its a persons "attitude" rather than gender which induces a pup/dog to look to them as a leader and as their preferred person.
If you have not got an air of authoriative leadership in your handling of the dog, then it will seek this out in someone else who it is in fairly close contact with.
Dogs do not gravitate towards or respect weak minded humans.
Some older dogs may have a preference for woman rather than men if past events have influenced this but rarely would a puppy instinctively prefer a female human,unless it suffered really dramatic nasty events from a male person when between 7 and 14 weeks old.
Maybe your attitude is "too" soft and lenient? Pups do need strong firm but fair discipline and they need training and someone who they can look up to and feel safe with.
Without actually knowing you and your fiancee and your personalities I can only guess at just why your puppy prefers to be around her rather then you.
Maybe your fiancee has that attitude of leadership and is a strong character.
Training and walking out the pup is a really great way to form a strong bond but ultimately it is the dog who will decide who it views as its leader and mentor.
Try being a bit more aloof with the pup and do not give it fuss on demand.
It must earn attention from you by obeying a command.
Trying to make a dog like you by treating it softly and being afraid to upset it will make the dog view you as weak. It needs to "respect" you and this is mainly achieved by training it and not always with positive methods, Dogs need correction to learn. So mix of positive "and" some Negative reinforcement training is the best way to go.

You can't force a dog to like you, just like you can't force a person to like someone.

Jojo, I have to disagree with you on some points. Some dogs do, in fact, gravitate towards the weaker members of their human pack. They respect the alpha as they should, but like to hang with a fellow sub. My dog is an example. I'm his alpha. He listens to me all the time and obeys my every command. Even outside off leash I have him under control. He'll stop on a dime if I tell him to. On the flip side, he barely listens to my husband, who had a hard time being authoritative in any way. The dog doesn't take him the least bit seriously. IE: My husband will tell him to go to the back behind the house to pee and the dog ignores him and goes to the front yard. All I have to do is yell, "Go to the back!" from the window and he immediately obeys. But guess who he prefers to hang out with? My pushover husband, who he sees as a playmate and sub rather than an alpha. Sure, some dogs look down on subs and hang with their alpha to raise their status by association, but not all dogs do.