Villain is regular (26/22/13) AF 3 on 250 hands.
Maybe cbetting this hand on flop would be better, it's weak enaugh that i dont mind being raised, but checked and we get the turn, I dont have many worse hands, so decided to raise, question is, should i go for a bigger raise trying t get rid of flush draw, and why is villain overbetting, is he expecting me to have ak here, or can he call my raise with any diamond hand only to rep dia flush on river, do you think it's possible?

PokerStars, Hold'em No Limit - $0.25/$0.50 - 6 players
Hand delivered by Upswing Poker

UTG (Hero): $52.85 (106 bb)
MP: $114.05 (228 bb)
CO: $49.43 (99 bb)
BU: $50.00 (100 bb)
SB: $139.31 (279 bb)
BB: $54.95 (110 bb)

Pre-Flop: ($1.50) Hero is UTG with T♥ A♣
Hero raises to $2, 4 players fold, BB calls $1.50

Flop: ($5) 3♦ J♦ 5♠ (2 players)
BB checks, Hero checks

Turn: ($5) Q♠ (2 players)
BB bets $3.56, Hero raises to $10.50, BB calls $6.94

River: ($26) T♦ (2 players)
BB bets $42.45 (all-in), UTG (Hero) folds

I'm not sure why we are raising when those Q and J hit him pretty good?

Think folding turn is good with only 2 nut outs

I guess so, just turned top of folding range into bluff if it makes any sense here, but it's proapbly too much with this exact combo

Why are you 4xing pre?

I would prefer a cbet.

Turn can't be too bad at a low frequency, but note that you aren't repping a lot of strong hands on the turn. QJs and perhaps AQ?