I have trouble with this guy, complicated more in details urgent yandere in need

I have a really great guy friend (that I kind of have a crush on) that I have known for around 11 years. Recently he got new friends that didn't like me and drove him Away from me. I tried to communicate with him, it was working but it was very... Weird. I got him a couple presents for his birthday(none of his other friends did this) he liked them. I also left a not of my guess/detective work and asked if his friends didn't like me. He said yes and they are making fun of me because of it, I replied who, he said he wouldn't tell me because I would get mad. One day, I decide to ask if everything is ok with that person, he said they stopped, so the next day I decide to ask him in person if he was sure, but as I came close to him his new

Hey guys we just launched a new dating app that's like nothing else out there. It lets you read reviews of past dates to keep the weirdos away and specify exactly what kind of date you are looking for (how much you want to spend/be spent on you, what type of experience you're looking for, and lots more. We weed out losers, spammers, and all the other nuisances you come to expect on most dating apps. The result is a high quality match that's right for you. Would love to get some feedback from everyone! https://itunes.apple.com/gb/app/tmo-dating/id1032349052?mt=8