[Closed] Call-Down to often?

Hi, it's me again ♦

After going from 76$ to 68$ in less than 750 hands, I'm wondering if I have a "trust-problem" and simply call down to much?

Flush and Straight-Danger, should I call this down or cancel it?
1)
Party Poker 0.10/0.20 Hold'em (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Preflop: Hero is UTG with Q, Q.
Hero raises, 5 folds, Button calls, 2 folds.

Flop: (5.50 SB) 6, 6, 7 (2 players)
Hero bets, Button calls.

Turn: (3.75 BB) 8 (2 players)
Hero bets, Button raises, Hero calls.

River: (7.75 BB) J (2 players)
Hero checks, Button bets, Hero calls.

Final Pot: 9.75 BB

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This guy had VPIP 45 and WTSD 60% while WonSD 25%.
Think he's a bluffer or assume he hit something?

2)
Party Poker 0.10/0.20 Hold'em (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Preflop: Hero is BB with Q, T.
3 folds, MP1 calls, 1 fold, MP3 calls, 3 folds, Hero checks.

Flop: (3.50 SB) 9, T, 3 (3 players)
Hero bets, MP1 folds, MP3 raises, Hero calls.

Turn: (3.75 BB) K (2 players)
Hero checks, MP3 bets, Hero calls.

River: (5.75 BB) 7 (2 players)
Hero checks, MP3 bets, Hero calls.

Final Pot: 7.75 BB

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3)
Did he hit his flush or is he trying to buy his way out? Probably a 3-bet would save me a lot of money, right?

Party Poker 0.10/0.20 Hold'em (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Preflop: Hero is UTG with K, J.
Hero calls, 3 folds, CO calls, Button raises, 2 folds, Hero calls, CO calls.

Flop: (7.50 SB) 2, 5, J (3 players)
Hero bets, CO raises, Button folds, Hero calls.

Turn: (5.75 BB) 4 (2 players)
Hero checks, CO bets, Hero calls.

River: (7.75 BB) 7 (2 players)
Hero checks, CO bets, Hero calls.

Final Pot: 9.75 BB

Thanks for any help.