Am I correct at understanding following?

[Shaky]

1. I used to think that I had never been dumped - I always thought nobody got rid of me.
2. Why have I gained 20 pounds - Why I've bacame heavier for 9 kilograms
3. They mind-trick you - They play unfair game with your thoughts
4. So they do a soft pass - no idea
5. They got little lines they like to tell you - They try not to tell you clear truth
6. You get jumpy when you smoke - Smoking makes you excited and uncertain
7. That's where I got stuck - At this point I met difficulty to figure it out
8. a gym - room for making gymnastic exercises
9. We'll talk. We'll get in touch. - We will connect very often for having many conversations.
10. Love you - Some manner of greeting between two who are well acquainted. Not necessarily they love each other.
11. He asked me out - He invited me to date.
12. Hi, this is Connor, Anna's friend, or whatever. - ......., problems with - or whatever
13. You are gonna make a fortune. - You will get big benefits from doing this soon.
14. Did you have to put me with the massage ads? - no idea

[James M]

[Shaky]

Thank you James for such wide explanation of number 14. Very helpful.

[James M]

[Beeesneees]

1. I used to think that I had never been dumped <-- Doesn't make much sense as it implies he had been dumped but didn't realise it. 'I used to think that no girlfriend/boyfriend had ended a relationship with me.
2. Why have I gained 20 pounds <-- Why have I become ... heavier (I'll take your word for the imperial - metric conversion!)
3. They mind-trick you - They play unfair game with your thoughts <-- YES
4. So they do a soft pass - no idea <-- I suspect it relates to American football... which means I have no idea either.
5. They got little lines they like to tell you - They try not to tell you clear truth <-- 'Lines' or 'lies'? lines: they have set expressions they like to use when they talk to you.
6. You get jumpy when you smoke - Smoking makes you excited and uncertain YES
7. That's where I got stuck - At this point I met difficulty to figure it out <-- That's where I had difficulty working out this problem and couldn't go any further with it, (or literally the person got wedged in a hole or opening).
8. a gym - room for making gymnastic exercises <-- Room or building for doing gymnastic exercises
9. We'll talk. We'll get in touch. - We will connect very often for having many conversations. <-- YES
10. Love you - Some manner of greeting between two who are well acquainted. Not necessarily they love each other. <-- YES
11. He asked me out - He invited me to date. <-- YES (on a date, not to a date).
12. Hi, this is Connor, Anna's friend, or whatever. - ......., problems with - or whatever <-- The speaker is not sure whether his relationship with Anna allows him to call her his friend. It's not grammatically correct. More like a 'youth culture' way of speaking, where anything can be 'or whatever'.
13. You are gonna make a fortune. - You will get big benefits from doing this soon. <-- yes, but 'gonna' should not be written unless you are reporting direct speech in a colloquial way. It is written 'going to' - even if it is said 'gonna'
14. Did you have to put me with the massage ads? - no idea[<-- Did you have to put my advert with the ads for massages (often considered to be 'seedy' as this is the sort of advert which may be placed by prostitutes/call girls).
_________________
Cheers m' dears!

[Shaky]

2. I used "became" wrongly because "become" is proper as past participle
5. Yes - lines
11. To say truthfully first I wanted to put there at a date, but didn't guess anyway :)
Respect , Beees