Talk to him nicely about it and if he don't leave you threaten him by pretending to get the cops involved or get a restraining order :)
Sometimes couples just need time apart and although it's a risk if you really love each other then you'll get back together. Although you might not feel it now, sometimes dating others will make you see things in a different light. It appears your girlfriend has her reasons for the split-up so I'd sit down with her and talk it out. Be honest with each other. Good luck Marcy
Does he usually show this lack of effort? Saying happy valentines day isn't hard is it! And if he was broke he still could have put in the effort to make you a card, or do something special for you that didn't require money e.g cooking you a meal. That's would id do if i was broke anyway. Have you notice weird encounters with him? Any signs he's cheating on you? If you think he's lying to you, I think you should. There are many more guys in the world that love you but are nervous to tell you because you have a boyfriend, by the way I'm a girl. I know he has hurt you, but not saying Happy Valentine's Day shouldn't be enough to split you up. Start communicating! Tell him how you feel. Some men just don't get it when they are young while other young men can't do enough for their girlfriends. If he's forgotten your birthday or other special occasions either you have one lazy boyfriend; he doesn't care or he's fooling around. Get to the bottom of it and if he doesn't seem interested in your feelings then kick this guy to the curb. When I was first going with my husband he was laid-off temporarily from a Union strike and had little money. He bought me one red rose and a card. I was so thrilled and it meant so much for me (even though these past 35 years he has given me a dozen red roses at Valentine's Day) that one red rose meant more to me than anything. I ended up pressing it in a book and still have it. You deserve better hon!
It's not a question of it being right or wrong, but how you feel about it. Are you OK with making out or having sex with a guy that is no longer interested in dating you? Are you realistic that this is just for fun, and that being physically intimate with him will not make him want to go back out with you? You're either fine with this or you're not. If you aren't, I'd suggest stop hanging out with him entirely. no. if u broke up that means you dont do anything that you would only do with someone who you are in a relationship with.
It's obvious he doesn't want to make anything out of your relationship and is lethargic enough where he doesn't want to deal with the problems you have with each other and has given up. Usually when someone makes the statement "I don't care what you do anymore" they are exasperated and fed-up, so something more is going on in your relationship than you are telling us. You have two choices. Sit down and resolve your problems or, leave. The ball is in your court and I highly suggest you are more honest with your own feelings.