After five heartbreaking years in the high school and college dating scene, my rule of thumb has become this: if you have to wonder if he's into you, he's probably not.

Here are some signs that, despite what you want to believe, he's just not that into you.

1. He doesn't make time for you.

He only sees you when it's convenient for him. All other plans, whether it be hanging with the guys, going out, or just lounging around doing nothing at home, takes precedence over spending time with you. If he doesn't carve out space for you in his schedule at least once a week, this proves he doesn't really care whether he sees you or not. If he did, he would make the time and effort to see you. Ask yourself this: if it weren't for you making the effort, would you ever see him?

2. He doesn't take you out.

If the only time you see him is when he comes over to your place to hook up, you're probably nothing more than that- a hook up. If he's not making the effort to plan dates, and take you out at least once a month, I wouldn't consider that dating. It's not about him spending money on you, it's about the effort to see you and make you feel special- because you are!

If he never goes out in public with you, that means he doesn't want people to see you together. If he can't even bother to pick you up and take you out to dinner once in a while, but has no problem ordering in pizza and eating it on your couch every weekend, maybe you should ask yourself whether this is a boy or a man you're dealing with.

3. He doesn't call you.

You may communicate primarily through Snapchat, which is far less inviting of in-depth conversations than texting. Just because he maintains the Snap streak doesn't mean he's into you. Let's face it- he most likely has Snap streaks with four or five other girls, which he also actively maintains.

Even if he is also texting you, this doesn't indicate how serious he considers your relationship. Think about all the other girls he's probably texting. Unless he takes the time to pick up his phone and call you to see how your day was, I hate to break it to you, but he's just not that into you.

4. You're usually the last person to hear about an update in his life.

Whether he got the job he wanted, won tickets to a baseball game, or flunked out of his economics class, you're not the first, nor one of the first, people he tells. You usually hear about this life updates through the grapevine, or when one of his friends casually mentions it, and you smile but scream internally, why didn't he tell me that? Everyone seems to know these things before you do. This means when something happens in his life, you're not someone he thinks of to tell. He's probably calling his mom instead of you, and you hear about it days or even weeks later.

5. He doesn't take you home.

If you've been seeing each other for several weeks, and he's never invited you back to his place, he's probably trying to keep you out of his private life.

If you have been dating for several months, and he's never brought you or invited you to his childhood home to meet his parents, he's definitely not serious about you. You can't consider your relationship serious if he has never even brought up the topic of you meeting his family. If he hasn't brought it up by now, he doesn't intend to ever bring you home to mom and dad.

6. His friends don't know you, or much about you.

If his friends aren't also your friends, he's just not that into you. If he isn't making the effort to invite you out with his friends from time to time so you all can get to know each other, then he isn't serious about the relationship.

7. He doesn't talk about the future.

If he never makes any mention of the future, he doesn't see a future for your relationship. I'm not saying he has to ask you to marry him, but if he has never even brought up the long-term potential of your relationship, the relationship is going nowhere.

8. He only cares about his own pleasure.

If his only concern is his own sexual pleasure, dump him. If he doesn't care about pleasing you, he doesn't care about you as a human being. In this case, he sees you as a sex object, not a girlfriend.

9. He avoids calling you his girlfriend.

He introduces you by name, without adding, "my girlfriend." He avoids making any mention of the relationship at all, actually- to anyone. This means he's keeping his options open is not committed to you in the slightest.

10. He doesn't say "I love you."

Of course, you're not going to fall in love with every guy you get involved with. And even when you do get involved, no sane couple is going to jump into saying "I love you" right away. It takes time. But if you have been together for several months to a year, and the topic has never even come up, his liking for you has most likely plateaued permanently.