<human>: 3 months ago my boyfriend (21) of a year broke up with me (18) because he "didn't think he was making me happy". At the time of the breakup, I made a complete fool of myself trying to get him back and so on, and he didn't budge. 

Maybe a month or so ago, I went to a party. My ex-boyfriend was there, and I ended up drinking and getting quite upset. I started talking to one of his friends and discovered we actually have loads in common. We ended up sharing a kiss that night, nothing more. 

Since then, we've been talking quite a bit. We went on a date last week, and then were at the same new years party where we ended up spending the night together. I really like him, although I'm not entirely sure of his feelings for me.

Here is the problem: Two weeks ago or so, my ex confessed that he wants to get back together with me. I initially said no, because I don't feel like I can trust him, and he completely broke my heart when he dumped me. He was my first love. We still see each other a fair bit, and I definitely still have loads of feelings for him. Since then he's been extremely persistent about being with me, and was completely devastated when I told him I had feelings for his friend. 

Is it wrong for me to keep seeing my ex's friend, if I still have feelings for my ex? I'm so scared to make any final decisions, because I don't know if I'll regret it. What if I get back together with my ex and miss out on something great? What if I choose my ex's friend and things don't work out? It'll all have been for nothing.

I don't know what to do.

Can you condense the text into a few key points?
<bot>: Dumped by boyfriend, started to have feelings for his friend, and now he wants to get back together. Help!