The most important things will be a few major things.
1) Make sure his actions and his words match up. If he says one thing, and does another more than a few times, drop him. If you are ever in doubt because he says one thing and does something else, always decide what to do based on his actions and ignore his words. I can't stress how important that is. Guys in general, and especially guys with bad intentions, will say all manner of things they don't mean which sound great but won't follow through with actions. Some of the good guys won't say much at all, but there actions will speak clearly. If you ignore their actions, you risk getting hurt (and many women do, because they like what they hear and desperately want to believe it - rather than looking at his actions which are usually very clear when they aren't interested).
2) Look for both consistency and frequency of contact and of meetings. Consistency is the best way to tell he is serious, frequency tells you how interested he is at a particular moment. Maybe sure whatever pace he sets, he is consistent. The frequency should increase naturally as you get to know each other. If he isn't consistent, drop him. If he isn't contacting you more than 2 times a week after 4 dates, drop him.
3) You need to make sure they accept and respect your answer when it is "No", especially if it's something you can't do, won't do, aren't comfortable with or aren't ready for. Men with questionable intentions will often keep going, pushing your boundary, and ignoring your "no" and will refuse to accept and respect it. It is a good test of someone's character when you seriously say "No" to them about something - watch how they react carefully, as it will tell you a lot about their character. It they can't handle you telling them "no" in a graceful manner, it's better to let them go and move on to someone else.
Last edited by Kjas on 04 Apr 2013, 6:03 am, edited 1 time in total.