These things can go on and on for ever. This is not a thorough explanation of all the uses and implications of gustar or caer bien. This should have stopped at the first few replies so not to make this seem complicated when it is not. It is actually pretty straight forward.
I always try to stick to the OPs specific Q as much as I can and not give too many other possibilities to avoid confusing the OP—especially when they are not advanced. An extensive explanation at this point can only lead to more confusion.
The question was basically what is the meaning/difference between gustarse & caerse bien?
To KISS, I answered directly on my first reply, but I will summarize it below:
1. There were errors in the verbs, they used gustarse and caerse bien (reflexive verbs ending in se), so they had to be corrected to gustar and caer bien (infinitive).
2. We are talking about people, so we eliminate gustar for things (cosas). That leaves us with gustar (alguien).
3. Gustar (alguien) can mean (i) to be attracted to someone romantically or (ii) to like someone just for friendship, to like their personality, etc.
4. Caer bien (alguien) means to like the person not romantically but being fond of them.
5. The context and other details will ultimately determine and reinforce exactly what the speaker wants to mean and express.
6. There are a few other uses of both verbs that cannot be understood by the OP until they have clarified and master the essential use of gustar & caer bien. So at first, it wasn’t a good time to deal with those.