Lessons learned from experience:

• if he's leaving - don't get attached.
• if you're trying too hard and he's not - it isn't real.
• if he makes a move on the first date - he's in it for one thing.
• if you don't feel right about it - don't do it.
• if he'll be sweet and attentive with you but neglects you otherwise - it's not worth it.
• if you sense you're being manipulated - you probably are.
• if he wanted to talk to you - he would.